Programming Model

Table 4-3. IP2 Chip Memory Map - Control and Status Registers (Continued)

IP2 Chip Base Address = $FFFBC000

Register

Register Name

 

 

 

Register Bit Names

 

 

 

Offset

 

D7

D6

D5

D4

D3

D2

D1

D0

 

 

 

 

 

 

 

 

 

 

$80

Programmable

0

IRE

INT

IEN

ICLR

IL2

IL1

IL0

 

Clock INT CON-

 

 

 

 

 

 

 

 

 

TROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

$81

Programmable

PLTY

PLS

0

EN

CLR

PS2

PS1

PS0

 

Clock GEN

 

 

 

 

 

 

 

 

 

CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

$82

Programmable

T15

T14

T13

T12

T11

T10

T9

T8

 

Clock TIMER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

$83

Programmable

T7

T6

T5

T4

T3

T2

T1

T0

 

Clock TIMER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

Chip ID Register

The read-only Chip ID Register is hard-wired to a hexadecimal value of $23. Writes to this register do nothing, however the IP2 chip terminates them normally with TA*.

ADR/SIZ

 

 

 

$FFFBC000 (8 bits)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

7

6

5

 

4

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

NAME

CID7

CID6

CID5

 

CID4

CID3

 

CID2

CID1

CID0

 

 

 

 

 

 

 

 

 

 

 

OPER

R

R

R

 

R

R

 

R

R

R

 

 

 

 

 

 

 

 

 

 

 

RESET

0

0

1

 

0

0

 

0

1

1

 

 

 

 

 

 

 

 

 

 

 

Chip Revision Register

!

Caution

The read-only Chip Revision Register is hard-wired to reflect the revision level of the IP2 chip ASIC. The current value of this register is $01. Writes to this register do nothing, however the IP2 chip terminates them normally with TA*.

This register reads zero on some IP2 chips. It should read 1. The workaround for this is to test the MC2 chip Revision Register.

http://www.mcg.mot.com/literature

4-17

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Image 253
Motorola MVME172 manual Chip ID Register, Chip Revision Register