
CHAPTER 3 CPU FUNCTION
User’s Manual U16541EJ4V0UD
84
(5/11)
Manipulatable Bits
Address
Function Register Name
Symbol
R/W
1
8
16
Default Value
FFFFF321H
BRG1 prescaler compare register
PRSCM1
√
00H
FFFFF324H
BRG2 prescaler mode register
PRSM2
√
00H
FFFFF325H
BRG2 prescaler compare register
PRSCM2
√
00H
FFFFF328H
BRG3 prescaler mode register
PRSM3
√
00H
FFFFF329H
BRG3 prescaler compare register
PRSCM3
√
00H
FFFFF340H
IIC division clock select register
OCKS0
Note 1
√
00H
FFFFF344H
IIC division clock select register
OCKS1
Note 1
√
00H
FFFFF348H
IEBus clock select register
OCKS2
Note 2
√
00H
FFFFF360H
IEBus control register
BCR
Note 2
√
00H
FFFFF361H
IEBus power save register
PSR
Note 2
R/W
√
00H
FFFFF362H
IEBus slave status register
SSR
Note 2
√
81H
FFFFF363H
IEBus unit status register
USR
Note 2
R
√
00H
FFFFF364H
IEBus interrupt status register
ISR
Note 2
√
00H
FFFFF365H
IEBus error status register
ESR
Note 2
√
00H
FFFFF366H
IEBus unit address register
UAR
Note 2
√
0000H
FFFFF368H
IEBus slave address register
SAR
Note 2
R/W
√
0000H
FFFFF36AH
IEBus partner address register
PAR
Note 2
√
0000H
FFFFF36CH
IEBus receive slave address register
RSA
Note 2
R
√
0000H
FFFFF36EH
IEBus control data register
CDR
Note 2
√
00H
FFFFF36FH
IEBus telegraph length register
DLR
Note 2
√
01H
FFFFF370H
IEBus data register
DR
Note 2
R/W
√
00H
FFFFF371H
IEBus field status register
FSR
Note 2
√
00H
FFFFF372H
IEBus success count register
SCR
Note 2
√
01H
FFFFF373H
IEBus communication count register
CCR
Note 2
R
√
20H
FFFFF400H
Port 0 register
P0
√
00H
Note 3
FFFFF402H
Port 1 register
P1
√
00H
Note 3
FFFFF406H
Port 3 register
P3
√
0000H
Note 3
FFFFF406H
Port 3 register L
P3L
√
00H
Note 3
FFFFF407H
Port 3 register H
P3H
√
00H
Note 3
FFFFF408H
Port 4 register
P4
√
00H
Note 3
FFFFF40AH
Port 5 register
P5
√
00H
Note 3
FFFFF40EH
Port 7 register L
P7L
√
00H
Note 3
FFFFF40FH
Port 7 register H
P7H
√
00H
Note 3
FFFFF412H
Port 9 register
P9
√
0000H
Note 3
FFFFF412H
Port 9 register L
P9L
√
00H
Note 3
FFFFF413H
Port 9 register H
P9H
√
00H
Note 3
FFFFF420H
Port 0 mode register
PM0
√
FFH
FFFFF422H
Port 1 mode register
PM1
√
FFH
FFFFF426H
Port 3 mode register
PM3
√
FFFFH
FFFFF426H
Port 3 mode register L
PM3L
√
FFH
FFFFF427H
Port 3 mode register H
PM3H
R/W
√
FFH
Notes 1. I
2C bus version (Y version) only
2. IEBus controller versions only
3. The output latch is 00H or 0000H. When these registers are input, the pin statuses are read.