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STW5093

Table 1. Programmable Register Intructions

Notes: 1. bit 7 of the address byte and data byte is always the first bit clocked into or out from: CI and CO pins when MICROWIRE serial

port is enabled.

X = reserved: write 0

2. "P" bit is Power up/down Control bit. P = 1 Means Power Down.Bit 1 indicates, if set, the presence of a second byte.

3. Bit 2 is write/read select bit.

4. Registers CR12, CR13, and CR14 are not accessible.

Function

Address byte

Data byte

7

654

32

10

Single byte Power up/down

P

X

X

X

X

X

0

X

none

Write CR0

P

000

00

1

X

see CR0 TABLE 2

Read-back CR0

P

000

01

1

X

see CR0

Write CR1

P

000

10

1

X

see CR1 TABLE 3

Read-back CR1

P

000

11

1

X

see CR1

Write Data to receive path

P

0

0

1

0

0

1

X

see CR2 TABLE 4

Read data from DR

P

0

0

1

0

1

1

X

see CR2

Write Data to DX

P

0

0

1

1

0

1

X

see CR3 TABLE 5

Write CR4

P

010

00

1

X

see CR4 TABLE 6

Read-back CR4

P

010

01

1

X

see CR4

Write CR5

P

010

10

1

X

see CR5 TABLE 7

Read-back CR5

P

010

11

1

X

see CR5

Write CR6

P

011

00

1

X

see CR6 TABLE 8

Read-back CR6

P

011

01

1

X

see CR6

Write CR7

P

011

10

1

X

see CR7 TABLE 9

Read-back CR7

P

011

11

1

X

see CR7

Write CR8

P

100

00

1

X

see CR8 TABLE 10

Read-back CR8

P

100

01

1

X

see CR8

Write CR9

P

100

10

1

X

see CR9 TABLE 11

Read-back CR9

P

100

11

1

X

see CR9

Write CR10

P

1

0

1

0

0

1

X

see CR10 TABLE 12

Read-back CR10

P

101

01

1

X

see CR10

Write CR11

P

1

0

1

1

0

1

X

see CR11 TABLE 13

Read-back CR11

P

101

11

1

X

see CR11

Write Test Register CR12

P

1

1

0

0

0

1

X

reserved

Write Test Register CR13

P

1

1

0

1

0

1

X

reserved

Write Test Register CR14

P

1

1

1

0

0

1

X

reserved