1
Features
Object Code Compatible with Earlier TS68000 Microprocessors
Addressing Mode Extensions for Enhanced Support of High Level Languages
New Bit Field Data Type Accelerates Bit-oriented Application, i.e. Video Graphics
Fast on-chip Instruction Cache Speed Instructions and Improves Bus Bandwidth
Co-processor Interface to Companion 32-bit Peripherals: TS68881 and TS68882
Floating Point Co-processors
Pipelined Architecture with High Degree of Internal Parallelism Allowing Multiple
Instructions to be Executed Concurrently
High Performance Asynchronous Bus in Non-multiplexed and Full 32 Bits
Dynamic Bus Sizing Efficiently Supports 8-, 16-, 32-bit Memories and Peripherals
Full Support of Virtual Memory and Virtual Machine
Sixteen 32-bit General-purpose Data and Address Registers
Two 32-bit Supervisor Stack Pointers and 5 Special Purpose Control Registers
18 Addressing Modes and 7 Data Types
4-Gbyte Direct Addressing Range
Processor Speed: 16.67 MHz - 20 MHz - 25 MHz
Power Supply: 5.0 V
DC
10%
Description
The TS68020 is the first full 32-bit implementation of the TS68000 family of micropro-
cessors. Using HCMOS technology, the TS68020 is implemented with 32-bit registers
and data paths, 32-bit addresses, a rich instruction set, and versatile addressing
modes.
Screening/Quality
This product is manufactured in full compliance with either:
MIL-STD-883 (class B)
DESC 5962 - 860320
or according to Atmel standards
See "Ordering Information" on page 43.
Pin connection: see page 3.
R suffix
PGA 114
Ceramic Pin Grid Array
F suffix
CQFP 132
Ceramic Quad Flat Pack
HCMOS 32-bit
Virtual Memory
Microprocessor
TS68020
Rev. 2115AHIREL07/02
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TS68020
2115AHIREL07/02
Introduction
The TS68020 is a high-performance 32-bit microprocessor. It is the first microprocessor
to have evolved from a 16-bit machine to a full 32-bit machine that provides 32-bit
address and data buses as well as 32-bit internal structures. Many techniques were uti-
lized to improve performance and at the same time maintain compatibility with other
processors of the TS68000 Family. Among the improvements are new addressing
modes which better support high-level language structures, an expanded instruction set
which provides 32-bit operations for the limited cases not supported by the TS68000
and several new instructions which support new data types. For special-purpose appli-
cations when a general-purpose processor alone is not adequate, a co-processor
interface is provided.
The TS68020 is a high-performance microprocessor implemented in HCMOS, low
power, small geometry process. This process allows CMOS and HMOS (high density
NMOS) gates to be combined on the same device. CMOS structures are used where
speed and low power is required, and HMOS structures are used where minimum sili-
con area is desired. This technology enables the TS68020 to be very fast while
consuming less power (less than 1.5 watts) and still have a reasonably small die size. It
utilizes about 190.000 transistors, 103.000 of which are actually implemented. The
package is a pin-grid array (PGA) with 114 pins, arranged 13 pins on a side with a
depopulated center and 132 pins ceramic quad flat pack.
Figure 1 is a block diagram of the TS68020. The processor can be divided into two main
sections: the bus controller and the micromachine. This division reflects the autonomy
with which the sections operate.
Figure 1. TS68020 Block Diagram
The bus controller consists of the address and data pads and multiplexers required to
support dynamic bus sizing, a macro bus controller which schedules the bus cycles on
the basis of priority with two state machines (one to control the bus cycles for operated
accesses and the other to control the bus cycles for instruction accesses), and the
instruction cache with its associated control.
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TS68020
2115AHIREL07/02
The micromachine consists of an execution unit, nanorom and microrom storage, an
instruction decoder, an instruction pipe, and associated control sections. The execution
unit consists of an address section, an operand address section, and a data section.
Microcode control is provided by a modified two-level store of microrom and nanorom.
Programmed logical arrays (PLAs) are used to provide instruction decode and sequenc-
ing information. The instruction pipe and other individual control sections provide the
secondary decode of instructions and generated the actual control signals that result in
the decoding and interpretation of nanorom and micorom information.
Figure 2. PGA Terminal Designation
Figure 3. CQFP Terminal Designation
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TS68020
2115AHIREL07/02
Figure 4. Functional Signal Groups
Signal Description
Figure 4 illustrates the functional signal groups and Table 1 lists the signals and their
function.
The V
CC
and GND pins are separated into four groups to provide individual power sup-
ply connections for the address bus buffers, data bus buffers, and all other output
buffers and internal logic.
Group
V
CC
GND
Address Bus
A9, D3
A10, B9,C3, F12
Data Bus
M8, N8, N13
L7, L11, N7, K3
Logic
D1, D2, E3, G11, G13
G12, H13, J3, K1
Clock
--
B1
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TS68020
2115AHIREL07/02
Table 1. Signal Index
Signal Name
Mnemonic
Function
Address Bus
A0-A31
32-bit Address Bus Used to address any of 4, 294, 967, 296 bytes.
Data Bus
D0-D31
32-bit Data Bus Used to Transfer 8, 16, 24 or 32 bits of Data Per Bus Cycle.
Function Codes
FC0-FC2
3-bit Function Case Used to Identify the Address Space of Each Bus Cycle.
Size
SIZ0/SIZ1
Indicates the Number of Bytes Remaining to be Transferred for this Cycle.
These Signals, Together with A0 And A1, Define the Active Sections of the
Data Bus.
Read-Modify-Write Cycle
RMC
Provides an Indicator that the Current Bus Cycle is Part of an Indivisibleread-
modify-write Operation.
External Cycle Start
ECS
Provides an Indication that a Bus Cycle is Beginning.
Operand Cycle Start
OCS
Identical Operation to that of ECS Except that OCS Is Asserted Only During
the First Bus Cycle of an Operand Transfer.
Address Strobe
AS
Indicates that a Valid Address is on The Bus.
Data Strobe
DS
Indicates that Valid Data is to be Placed on the Data Bus by an External
Device or has been Laced on the Data Bus by the TS68020.
Read/Write
R/W
Defines the Bus Transfer as an MPU Read or Write.
Data Buffer Enable
DBEN
Provides an Enable Signal for External Data Buffers.
Data Transfer and Size
Acknowledge
DSACK0/DSACK1
Bus Response Signals that Indicate the Requested Data Transfer Operation
is Completed. In Addition, these Two Lines Indicate the Size of the External
Bus Port on a Cycle-by-cycle Basis.
Cache Disable
CDIS
Dynamically Disables the On-chip Cache to Assist Emulator Support.
Interrupt Priority Level
IPL0-IPL2
Provides an Encoded Interrupt Level to the Processor.
Autovector
AVEC
Requests an Autovector During an Interrupt Acknowledge Cycle.
Interrupt Pending
IPEND
Indicates that an Interrupt is Pending.
Bus Request
BR
Indicates that an External Device Requires Bus Mastership.
Bus Grant
BG
Indicates that an External Device may Assume Bus Mastership.
Bus Grant Acknowledge
BGACK
Indicates that an External Device has Assumed Bus Mastership.
Reset
RESET
System Reset.
Halt
HALT
Indicates that the Processor Should Suspend Bus Activity.
Bus Error
BERR
Indicates an Invalid or Illegal Bus Operation is Being Attempted.
Clock
CLK
Clock Input to the Processor.
Power Supply
V
CC
+5-volt 10% Power Supply.
Ground
GND
Ground Connection.
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