SA3488 Datasheet, PDF (16/20 Pages) Sames – CMOS 256 X 256 DIGITAL SWITCHING MATRIX

SA3488
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 X X X X X Bo2 Bo1 Bo0 1^st Data Byte: selected output
bus
X
0 0 0 1 X X X Co4 Co3 Co2 Co1 Co0 2^nd Data Byte: selected output
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 0 1 0 A7 A6 A5 C8 1 0 0 0 OR2
(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 1^st Data Byte: most significant
digits of selection mask
X
0 0 0 1 X X X Mi4 Mi3 Mi2 Mi1 Mi0 2^nd Data Byte: most significant
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 0 1 0 P2 P1 P0 Fn 1 1 1 0 OR2
Notes: 1.
2.
3.
4.
5.
Regarding mask bits Mi0 to Mi7 a logic “0” level means disabling condition, a logic “1” level means
enabling condition.
A null mask or a RESET pulse clears the mask and the deep background mask registers and disable
channel 0 extraction function.
Reading of OR2 is optional after mask store or redefinition, because function is activated only by not-
null mask writing.
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.
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.
sames
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