
CHAPTER 14 RESET FUNCTION
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Table 14-1. Hardware Status after Reset
Hardware
Status after Reset
Program counter (PC)
Note 1
Contents of reset vector table
(0000H, 0001H) are set
Stack pointer (SP)
Undefined
Program status word (PSW)
02H
RAM
Data memory
Undefined
Note 2
General-purpose register
Undefined
Note 2
Port (output latch)
Ports 0-2, ports 4-10 (P0-P2, P4-P10)
00H
Port read
(PLR7-PLR9)
Undefined
Port mode register
(PM0, PM2, PM4-PM6)
FFH
Pull-up resistor option register (PU0, PU2, PU4)
00H
Processor clock control register (PCC)
04H
Memory size select register (IMS)
CCH
Note 3
Internal expansion RAM size select register (IXS)
0CH
Note 4
Oscillation stabilization time select register (OSTS)
04H
8-bit remote control timer
Capture registers (CP10, CP11)
00H
Mode control register (TMC1)
00H
8-bit PWM timer
Timer registers (TM50, TM51)
00H
Compare registers (CR50, CR51)
Undefined
Mode control registers (TMC50, TMC51)
04H
Clock select registers (TCL50, TCL51)
00H
Watchdog timer
Clock select register (WDCS)
00H
Mode register (WDTM)
00H
A/D converter
Conversion result register (ADCRH0)
Undefined
Mode register (ADM0)
00H
Analog input channel specification register (ADS0)
00H
Serial interface
Shift register (SIO3)
Undefined
Mode register (CSIM3)
00H
FIP controller/driver
Display mode register 0 (DSPM0)
10H
Display mode register 1 (DSPM1)
01H
Display mode register 2 (DSPM2)
00H
Interrupt
External interrupt rising edge enable register (EGP)
00H
External interrupt falling edge enable register (EGN)
00H
Request flag registers (IF0L, IF0H)
00H
Mask flag registers (MK0L, MK0H)
FFH
Priority specification flag registers (PR0L, PR0H)
FFH
Notes 1.
Of the hardware units, only the contents of the PC are undefined during reset input or oscillation
stabilization time wait. The statuses of the other hardware units are the same as those after reset.
2.
The status after reset is retained in the standby mode.
3.
Be sure to set CFH when using the
m
PD780228.
4.
After reset, be sure to set this bit to 0BH.