NEC PD78052 User Manual page 303

CHAPTER 16 SERIAL INTERFACE CHANNEL 0 ( PD78054 Subseries)
Symbol
<7> <6> <5>
CSIM0 CSIE0 COI WUP
R/W Serial Interface Channel 0 Clock Selection
CSIM01 CSIM00
0 Input Clock to SCK0 pin from off-chip
1 0 8-bit timer register 2 (TM2) output
1 1 Clock specified with bits 0 to 3 of timer clock select register 3 (TCL3)
R/W
CSIM CSIM CSIM
PM25 P25 PM26 P26 PM27 P27
04 03 02
Note 2
Note 2
0
0 1
1
1 0
SBI mode (See section 16.4.3, "SBI mode operation".)
1 1 2-wire serial I/O mode (See section 16.4.4, "2-wire serial I/O mode operation".)
R/W WUP Wake-up Function Control
0 Interrupt request signal generation with each serial transfer in any mode
Interrupt request signal generation when the address received after bus release
1
(when CMDD = RELD = 1) matches the slave address register (SVA) data in SBI mode
R/W CSIE0 Serial Interface Channel 0 Operation Control
0 Operation stopped
1 Operation enabled
Notes 1. Bit 6 (COI) is a read-only bit.
2. Can be used as P25 (CMOS input/output) when used only for transmission.
3. Be sure to set WUP to 0 when the 3-wire serial I/O mode is selected.
Remark : don't care
PM : Port mode register
P : Port output latch
4 3 2 1
CSIM04 CSIM03 CSIM02 CSIM01 CSIM00
Operation
Mode
3-wire serial
0 0 0 1
l/O mode
Note 3
0 Address After Reset
FF60H 00H
SIO/SB0/P25
Start Bit
Pin Function
MSB Note 2
SI0
(Input)
LSB
R/W
R/W Note 1
SO0/SB1/P26 SCK0/P27
Pin Function Pin Function
SO0 SCK0 (CMOS
(CMOS output) input/output)
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