44
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
3827 Group
MITSUBISHI MICROCOMPUTERS
Fig. 50 Initial status at reset
Address
(28)
(29)
(30)
(31)
(32)
(33)
(34)
(35)
(36)
(37)
(38)
(39)
(40)
(41)
(42)
(43)
(44)
(45)
(46)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
Port P0 direction register
Port P1 direction register
Port P2 direction register
Port P3 output control register
Port P4 direction register
Port P5 direction register
Port P6 direction register
Port P7 direction register
Key input control register
PULL register A
PULL register B
Serial I/O1 status register
Serial I/O1 control register
UART control register
Serial I/O2 control register
Timer X (low-order)
Timer X (high-order)
Timer Y (low-order)
Timer Y (high-order)
Timer 1
Timer 2
Timer 3
Timer X mode register
Timer Y mode register
Timer 123 mode register
TOUT/
φ output control register
PWM control register
000116
000316
000516
000716
000916
000B16
000D16
000F16
001516
001616
001716
001916
001A16
001B16
001D16
002016
002116
002216
002316
002416
002516
002616
002716
002816
002916
002A16
002B16
Register contents
Address
Note: The contents of all other register and RAM are undefined after reset, so they must be initialized by software.
! : Undefined
Register contents
0016
3F16
0016
FF16
0116
FF16
0016
003116
003216
003316
003416
003516
003616
003716
003816
003916
003A16
003B16
003C16
003D16
003E16
003F16
(PS)
(PCH)
(PCL)
A-D control register
A-D conversion register
(low-order)
A-D conversion register
(high-order)
D-A1 conversion register
D-A2 conversion register
D-A control register
Watchdog timer control register
Segment output enable register
LCD mode register
Interrupt edge selection register
CPU mode register
Interrupt request register 1
Interrupt request register 2
Interrupt control register 1
Interrupt control register 2
Processor status register
Program counter
Watchdog timer (high-order)
Watchdog timer (low-order)
Contents of address FFFD 16
Contents of address FFFC 16
0816
XX16
0016
3F16
FF16
!
1
10 00 00 00
11 10 00 00
00 11 11 11
01 00 10 00