MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Address Register contents
Address Register contents
(1) Port P0 direction register
(2) Port P1 direction register
(3) Port P2 direction register
(4) Port P3 output control register
(5) Port P4 direction register
(6) Port P5 direction register
(7) Port P6 direction register
(8) Port P7 direction register
(9) Key input control register
(10) PULL register A
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
0016
003116
003216
003316
003416
003516
003616
003716
003816
003916
003A16
003B16
003C16
003D16
003E16
003F16
(28) A-D control register
0816
0016
(29) A-D conversion register
(low-order)
(30) A-D conversion register
(high-order)
(31) D-A1 conversion register
(32) D-A2 conversion register
(33) D-A control register
XX16
0016
XX16
0016
0016
0016
0016
0016
0016
0 0 1 1 1 1 1 1
0016
(34) Watchdog timer control register
(35) Segment output enable register
(36) LCD mode register
0016
0016
0016
0016
3F16
(37) Interrupt edge selection register
(38) CPU mode register
0016
0 1 0 0 1 0 0 0
(11) PULL register B
0016
1 0 0 0 0 0 0 0
(12) Serial I/O1 status register
(13) Serial I/O1 control register
(14) UART control register
(15) Serial I/O2 control register
(16) Timer X (low-order)
(17) Timer X (high-order)
(18) Timer Y (low-order)
(19) Timer Y (high-order)
(20) Timer 1
(39) Interrupt request register 1
(40) Interrupt request register 2
(41) Interrupt control register 1
(42) Interrupt control register 2
(43) Processor status register
(44) Program counter
0016
0016
0016
0016
0016
1 1 1 0 0 0 0 0
0016
FF16
FF16
FF16
FF16
FF16
0116
FF16
0016
0016
0016
0016
0016
1
(PS) ✕ ✕ ✕ ✕ ✕
✕ ✕
Contents of address FFFD16
Contents of address FFFC16
(PCH)
(PCL)
(45) Watchdog timer (high-order)
(46) Watchdog timer (low-order)
3F16
FF16
(21) Timer 2
(22) Timer 3
(23) Timer X mode register
(24) Timer Y mode register
(25) Timer 123 mode register
(26) TOUT/φ output control register
(27) PWM control register
Note: The contents of all other register and RAM are undefined after reset, so they must be initialized by software.
✕ : Undefined
Fig. 50 Initial status at reset
44
MITSUBISHI [ Mitsubishi Group ]
