upd75238 Renesas Electronics Corporation., upd75238 Datasheet - Page 93

• Manufacturer Part Number: upd75238
• Description: 4 Bit Single-chip Microcomputer
• Manufacturer: Renesas Electronics Corporation.

SO0 latch
SO0 latch
RELT
(Master)
CMDT
(Master)
Caution Do not set the ACKT until the transfer is completed.
CMDD
CMDD
Set after transfer completion.
CMDT
RELD
RELD
SCK0
SCK0
RELT
SIO0
SIO0
SB0/SB1
ACKT
SCK0
Transfer operation start specification
6
"H"
Fig. 4-43 Operations of RELT, CMDT, RELD, and CMDD (Master)
D2
Fig. 4-44 Operations of RELT, CMDT, RELD, and CMDD (Slave)
7
D1
8
D0
Fig. 4-45 Operation of ACKT
9
D7
When set during this period
1
D6
2
D1
7
ACK
D0
8
ACK signal is output during first clock
cycle immediately after ACKT is set.
When address match is found
When address mismatch is found
Transfer operation start specification
Write to SIO0
PD75238
93