SA3488

sames

16

INSTRUCTION 5: TRANSFER OF AN OUTPUT CHANNEL CONTROL WORD

Control Signals

Data Bus

Match C/D CS

WR RD

D7

D6

D5

D4

D3

D2

D1

D0

Notes

X

0

0

0

1

XXX

bus

X

0

0

0

1

X

X

X

channel

X

1

0

0

1

X

X

X

X

1

0

0

0

Instruction Opcode

Yes

0

0

1

0

C7

C6

C5

C4

C3

C2

C1

C0

OR1 : CM selected CM word

copy

Yes

1

010

A7

A6

A5

C8

10

00OR2

(Bo2 Bo1 Bo0 C8

1

0

0

0)

INSTRUCTION 6: CHANNEL 0 SELECTION MASK STORE/DATA TRANSFER

Control Signals

Data Bus

Match C/D CS

WR RD

D7

D6

D5

D4

D3

D2

D1

D0

Notes

X

0

0

0

1

X

X

X

X

X

Mi7 Mi6

Mi5

digits of selection mask

X

0

0

0

1

X

X

X

Mi4

Mi3

Mi2 Mi1

Mi0

digits of selection mask

Yes

1

0

0

1

X

X

X

X

1

1

1

0

Instruction Opcode

Mask store control

Yes

0

0

1

0

(previous content)

OR1 : register is not affected

Yes

1

0

1

0

N2

N1

N0

Tn

1

1

1

0

OR2 : see below

First Data Transfer (after DR going low)

Yes

0

0

1

0

(previous content)

OR1 : register is not affected

Yes

1

0

1

0

N2

N1

N0

Tn

1

1

1

0

OR2 : see below

Repeated Data Transfer (after first OR2 transfer)

Yes

0

0

1

0

S7

S6

S5

S4

S3

S2

S1

S0

OR1 : expected message stored

in SM

Yes

1

010

P2

P1

P0

Fn

11

10OR2

Notes: 1.

Regarding mask bits Mi0 to Mi7 a logic “0” level means disabling condition, a logic “1” level means

enabling condition.

2.

A null mask or a RESET pulse clears the mask and the deep background mask registers and disable

channel 0 extraction function.

3.

Reading of OR2 is optional after mask store or redefinition, because function is activated only by not-

null mask writing.

4.

After mask store (N2 N1 N0) is the sum of activated channels, after DR is the sum of active channels;

Tn=1/0 means activation/suppression of the function after store while after DR only Tn = 1 can appear

indicating non-null configuration extraction.

5.

Reading of OR2 is imperative after DR in order to step the data transfer; reading of OR1 is also needed

to scan in descending order the priority register. Relevant messages only are considered, i.e. only

messages with a MSD label different from 0 1.

6.

(P2 P1 P0) is the PCM bus on which the message copied in OR1 was found; Fn is a continuation bit

telling respectively on level 1/0 for any more/no more extraction to be performed.