CALIFORNIA MICRO DEVICES G65SC816 Service Manual

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CALIFORNIA MICRO DEVICES

CMOS 8/16-BIT MICROPROCESSOR FAMILY

Features

 Advanced CMOS design for low power consumption

and increased noise immunity

 Emulation mode for total software compatibility

with 6502 designs

 Full 16-bit ALU, Accumulator, Stack Pointer,

and Index Registers

 Direct register for zero page addressing

 24 addressing modes (including 13 original

6502 modes)

 Wait for Interrupt (WAI) and Stop the Clock (STP)

instructions for reduced power consumption and

decreased interrupt latency

 91 instructions with 255 opcodes

 Co-Processor (COP) instruction and associated vector

 Powerful Block Move instructions

G65SC816

 Full 16-bit operation with 24 address lines for the

16 MByte memory

 Program selectable 8-bit mode for 6502 coding

compatibility Valid Program Address (VPA) and Valid

Data Address (VDA) outputs for dual cache and DMA

cycle steal implementation

 Vector Pull (VP) output indicates when interrupt

vectors are being fetched. May be used for

vectoring/prioritizing interrupts

 Abort interrupt and associated vector for interrupting

any instruction without modifying internal registers

 Memory Lock (ML) for multiprocessor system

implementation

 40-pin DIP, 44-pin PLCC

Contact factory for complete data sheet.

Product Description

The G65SC816 is an advanced CMOS 16-bit microprocessor featuring total software compatibility with 8-bit NMOS and

CMOS 6500 series microprocessors. The G65SC816 provides 24 address lines for 16 Mbyte addressing, while providing

both 8-bit and 16-bit operation.

This microprocessor contains an Emulation (E) mode for emulating 8-bit NMOS and CMOS 6500 Series microprocessors.

A software switch determines whether the processor is in the 8-bit emulation mode or in the native 16-bit mode. This

allows existing 8-bit system designs to use the many powerful features of the G65SC816.

Block Diagram

RQ

RES

NMI

I

ABORT

A0 A15

D0/BA0-D7/BA7

ADDRESS BUFFER

DATA BUS BANK

ADDRESS BUFFER

INDEX X & Y STACK
POINTER REGS (16)

ALU (16)

ACCUMULATOR

(16)

PROGRAM

COUNTER (16)

DIRECT REG

(16)

PROGRAM DATA

BANK RAGS (8)

16-BIT INTERNAL DATA BUS

CONROL
SIGNALS

INTERRUPT

CONTROL

INSTRUCTION

DECODE

AND

CONTROL

CPU

STATUS

REG

TIMING

AND

CLOCK GEN

SYSTEM

CONTROL

RDY

2 (IN)

Ø

1 (OUT)

Ø

2 (OUT)

Ø

W

R/
SYNC
VPA
VDA
ML
VP
E
M/X

BE

© 1987, 1996 CMD Corp. All rights reserved.

8/96 215 Topaz Street, Milpitas, California 95035 Tel: [phone] Fax: [phone]

SO

CALIFORNIA MICRO DEVICES

Pin Assignments

G65SC816

VP

RDY

ABORT

IRQ

ML

NMI

VPA

V

DD

DD

A0
A1
A2
A3
A4
A5
A6
A7
A8

A9
A10
A11

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

Ordering Information

40
39
38
37
36
35
34
33
32
31
30
29

G65SC816

28
27
26
25
24
23
22
21

RES
VDA
M/X

Ø

BE
E
R/
DO/BA0
D1/BA1
D2/BA2
D3/BA3
D4/BA4
D5/BA5
D6/BA6
D7/BA7
A15
A14
A13
A12
V

2(IN)

W

SS

NMI

VPA

VDD

A0
A1

V

SS

SS

A2
A3
A4
A5
A6

7
8
9
10
11
12
13
14
15
16
17

ML
6

18
A7

IRQ
5

19
A8

ABORT

RDY

VP

V

4

3

2

1

G65SC816

20

21

22

23

A9

A10

SS

A11

V

SS

SS

RES

44

24

SS

SS

V

VDA

43

25

A12

M/X

42

26

A13

Ø2(IN)

BE

41

40

39
38
37
36
35
34
33
32
31
30
29

27

28

A14

A15

E
R/W
V

DD

DD

D0/BA0
D1/BA1
D2/BA2
D3/BA3
D4/BA4
D5/BA5
D6/BA6
D7/BA7

Example:

G55C816 P I -4

Product Identification Number

Package

P  Plastic DIP (40)

PE  PLCC (44)

Temperature/Processing

I  -40

O

C to +85OC, ±5% P.S. Tol.

Performance Designator

Designators selected for speed and power specifications

 4 4MHz

 5 5MHz

© 1987, 1996 CMD Corp. All rights reserved.

215 Topaz Street, Milpitas, California 95035 Tel: [phone] Fax: [phone] 8/96