NEC PD78214 User Manual
Page 313
284
µ
PD78214 Sub-Series
Table 10-2 Signals in SBI Mode (1/3)
SCK
SB0
“
H
”
“
H
”
SCK
SB0
Rising edge of SB0
while SCK is set to 1
Falling edge of SB0
while SCK is set to 1
Bus release signal
(REL)
Command signal
(CMD)
Output
device
Definition
• RELT is set.
• CMDT is set.
Output condition
• RELD is set.
• CMDD is clear-
ed.
• CMDD is set.
Influence on flag
Description
Following this signal,
the CMD signal is
output to indicate that
the transmission data
is an address.
(1)
If this signal is output
after the REL signal,
the transmission data
is an address.
(2)
If this signal is output
without the REL signal,
the transmission data
is a command.
Signal name
Timing chart
Master
Master