M38503MXH Datasheet, PDF (34/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Address Register contents
Address Register contents
(1) Port P0 (P0)
000016
0016
(34) MISRG
003816
0016
(2) Port P0 direction register (P0D)
000116
0016
(35) Watchdog timer control register (WDTCON) 003916 _{0 0 1 1 1 1 1 1}
(3) Port P1 (P1)
000216
0016
(36) Interrupt edge selection register (INTEDGE) 003A16
0016
(4) Port P1 direction register (P1D)
(5) Port P2 (P2)
000316
000416
0016
0016
(37) CPU mode register (CPUM)
(38) Interrupt request register 1 (IREQ1)
003B16 _{0 1 0 0 1 0 0 0}
003C16
0016
(6) Port P2 direction register (P2D)
000516
0016
(39) Interrupt request register 2 (IREQ2)
003D16
0016
(7) Port P3 (P3)
000616
0016
(40) Interrupt control register 1 (ICON1)
003E16
0016
(8) Port P3 direction register (P3D)
000716
0016
(41) Interrupt control register 2 (ICON2)
003F16
0016
(9) Port P4 (P4)
000816
0016
(42) Processor status register
(PS) X X X X X 1 X X
(10) Port P4 direction register (P4D)
000916
0016
(43) Program counter
(PCH) FFFD16 contents
(11) Serial I/O2 control register 1 (SIO2CON1) ₀₀₁₅₁₆
0016
(PCL) FFFC16 contents
(12) Serial I/O2 control register 2 (SIO2CON2) _{001616 0 0 0 0 0 1 1 1}
(13) Serial I/O2 register (SIO2)
001716 X X X X X X X X
(14) Transmit/Receive buffer register (TB/RB) ₀₀₁₈₁₆ X X X X X X X X
(15) Serial I/O1 status register (SIOSTS)
001916 1 0 0 0 0 0 0 0
(16) Serial I/O1 control register (SIOCON)
001A16
0016
(17) UART control register (UARTCON)
001B16 1 1 1 0 0 0 0 0
(18) Baud rate generator (BRG)
001C16 X X X X X X X X
(19) PWM control register (PWMCON)
001D16
0016
(20) PWM prescaler (PREPWM)
001E16 X X X X X X X X
(21) PWM register (PWM)
001F16 X X X X X X X X
(22) Prescaler 12 (PRE12)
002016
FF16
(23) Timer 1 (T1)
002116
0116
(24) Timer 2 (T2)
002216
0016
(25) Timer XY mode register (TM)
002316
0016
(26) Prescaler X (PREX)
002416
FF16
(27) Timer X (TX)
002516
FF16
(28) Prescaler Y (PREY)
002616
FF16
(29) Timer Y (TY)
002716
FF16
(30) Timer count source selection register (TCSS) ₀₀₂₈₁₆
0016
(31) A-D control register (ADCON)
003416 0 0 0 1 0 0 0 0
(32) A-D conversion low-order register (ADL) ₀₀₃₅₁₆ X X X X X X X X
(33) A-D conversion high-order register (ADH) _{003616 0 0 0 0 0 0 X X}
Note : X : Not fixed
Since the initial values for other than above mentioned registers and
RAM contents are indefinite at reset, they must be set.
Fig. 38 Internal status at reset
34