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47
3819 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 46 Internal status at reset
0 1 001 0 0 0
0016
(000016)
(1) Port P0
! : Undefined
The contents of all other registers and RAM are undefined at reset, so set their initial values.
Note :
Register contents
Address
0016
(000216)
(2) Port P1
0016
(000416)
(3) Port P2
0F16
(000516)
(4) Port P2 direction register
0016
(000616)
(5) Port P3
0016
(000816)
(6) Port P4
0016
(000916)
(7) Port P4 direction register
0016
(000A16)
(8) Port P5
0016
(000B16)
(9) Port P5 direction register
0016
(000C16)
(10) Port P6
0016
(000D16)
(11) Port P6 direction register
0016
(000E16)
(12) Port P7
0016
(000F16)
(13) Port P7 direction register
0016
(001016)
(14) Port P8
0016
(001116)
(15) Port P8 direction register
0016
(001216)
(16) Port P9
0016
(001416)
(17) Port PA
0016
(001516)
(18) Port PA direction register
0016
(001616)
(19) Port PB
0016
(001716)
(20) Port PB direction register
0016
(001916)
(21) Serial I/O1 control register
0016
(001A16)
(22) Serial I/O automatic transfer
0016
(001C16)
(23) Serial I/O automatic transfer
0016
(001D16)
(24) Serial I/O2 control register
0016
(001E16)
(25) Serial I/O3 control register
FF16
(002016)
(26) Timer 1
0116
(002116)
(27) Timer 2
FF16
(002216)
(28) Timer 3
FF16
(002316)
(29) Timer 4
FF16
(002416)
(30) Timer 5
FF16
(002516)
(31) Timer 6
Register contents
Address
0016
(002816)
(32) Timer 12 mode register
0016
(002916)
(33) Timer 34 mode register
0016
(002A16)
(34) Timer 56 mode register
0016
(002B16)
(35) D-A conversion register
1016
(002C16)
(36) AD/DA control register
0016
(003116)
(37) Interrupt interval determination
control register
0016
(003216)
(38) Port P0 segment/digit
switch register
0016
(003316)
(39) Port P2 digit/port switching
register
0016
(003416)
(40) Port P8 segment/port
switch register
0016
(003516)
(41) Port PA segment/port switch
0016
(003616)
(42) FLDC mode register 1
0016
(003716)
(43) FLDC mode register 2
0016
(003916)
(44) Zero cross detection control
register
0016
(003A16)
(45) Interrupt edge selection register
(003B16)
(46) CPU mode register
0016
(003C16)
(47) Interrupt request register 1
0016
(003D16)
(48) Interrupt request register 2
0016
(003E16)
(49) Interrupt control register 1
0016
(003F16)
(50) Interrupt control register 2
!
(PS)
(51) Processor status register
Contents of address FFFD16
(PCH)
(52) Program counter
control register
interval register
Contents of address FFFC16
(PCL)
! !!! 1 !!