1-65
3874 Group User’s Manual
HARDWARE
FUNCTIONAL DESCRIPTION
Fig. 69 Internal status at reset
(1)
Port P0
(2)
Port P0 direction register
(3)
Port P1
(4)
Port P1 direction register
(5)
Port P2
(6)
Port P2 direction register
(7)
Port P3
(8)
Port P3 direction register
(9)
Port P4
(10) Port P4 direction register
(11) Port P5
(12) Port P5 direction register
(13) Port P6
(14) Port P6 direction register
(15) Port P7
(16) Port P7 direction register
(17) Port P8
(18) Port P8 direction register
(19) Port P9
(20) Serial I/O3 control register 1
(21) Serial I/O3 control register 2
(22) Serial I/O3 control register 3
(23) Serial I/O3 automatic transfer data pointer
(24) Serial I/O1 status register
(25) Serial I/O1 control register
(26) UART control register
(27) Serial I/O2 control register
(28) Watchdog timer control register
(29) Timer X (low-order)
(30) Timer X (high-order)
FF16
0016
2016
0016
1016
0116
0016
0816
0016
4816
0016
FFFD16 contents
FFFC16 contents
Register contents
Address
000016
000116
000216
000316
000416
000516
000616
000716
000816
000916
000A16
000B16
000C16
000D16
000E16
000F16
001016
001116
001216
001416
001516
001616
001716
001916
001A16
001B16
001D16
001E16
002016
002116
0016
8016
0016
E016
0016
3F16
FF16
Register contents
Address
Notes: ! : Not fixed
Notes: Since the initial values for other than above-mentioned registers and RAM contents are indefinite at reset, they must be set.
(31) Timer Y (low-order)
(32) Timer Y (high-order)
(33) Timer 1
(34) Timer 2
(35) Timer 3
(36) Timer X mode register
(37) Timer Y mode register
(38) Timer 123 mode register
(39) Communication mode register
(40) Transmit control register
(41) Transmit status register
(42) Receive control register
(43) Receive status register
(45) Control field selection register
(46) PULL UP register
(47) A-D control register
(48) Interrupt source discrimination register 2
(50) Interrupt source discrimination register 1
(52) Interrupt edge selection register
(53) CPU mode register
(54) Interrupt request register 1
(55) Interrupt request register 2
(56) Interrupt control register 1
(57) Interrupt control register 2
(58) Processor status register
(59) Program counter
002716
002816
002916
002A16
002B16
002C16
002D16
002E16
002F16
003016
003316
003416
003616
003716
003816
003916
003A16
003B16
003C16
003D16
003E16
003F16
(PS)
(PCH)
(PCL)
002216
002316
002416
002516
002616
! 00 0 0 0 0
00 0
!! ! 0
0
!! 1
!
!! !
!
(44) Bus interrupt source discrimination control
register
(49) Interrupt source discrimination control
register 2
(51) Interrupt source discrimination control
register 1
0116