CHAPTER 16 RESET FUNCTION
Preliminary User’s Manual U16846EJ1V0UD
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Table 16-1. Hardware Statuses After Reset Acknowledgment (1/2)
Hardware
Status After Reset
Acknowledgment
Note 1
Program counter (PC)
The contents of the
reset vector table
(0000H, 0001H) are
set.
Stack pointer (SP)
Undefined
Program status word (PSW)
02H
Data memory
Undefined
Note 2
RAM
General-purpose registers
Undefined
Note 2
Port registers (P0 to P3, P12, P13) (output latches)
00H (undefined only
for P2)
Port mode registers (PM0, PM1, PM3, PM12)
FFH
Pull-up resistor option registers (PU0, PU1, PU3, PU12)
00H
Input switch control register (ISC)
00H
Internal memory size switching register (IMS)
CFH
Internal expansion RAM size switching register (IXS)
0CH
Processor clock control register (PCC)
00H
Ring-OSC mode register (RCM)
00H
Main clock mode register (MCM)
00H
Main OSC control register (MOC)
00H
Oscillation stabilization time select register (OSTS)
05H
Oscillation stabilization time counter status register (OSTC)
00H
System wait control register (VSWC)
00H
Note 3
Timer counter 00 (TM00)
0000H
Capture/compare registers 000, 010 (CR000, CR010)
0000H
Mode control register 00 (TMC00)
00H
Prescaler mode register 00 (PRM00)
00H
Capture/compare control register 00 (CRC00)
00H
16-bit timer/event counter 00
Timer output control register 00 (TOC00)
00H
Timer counter 50 (TM50)
00H
Compare register 50 (CR50)
00H
Timer clock selection register 50 (TCL50)
00H
8-bit timer/event counter 50
Mode control register 50 (TMC50)
00H
Compare registers 00, 10, 01, 11 (CMP00, CMP10, CMP01, CMP11) 00H
8-bit timer/event counters H0, H1
Mode registers (TMHMD0, TMHMD1)
00H
Mode register (WDTM)
67H
Watchdog timer
Enable register (WDTE)
9AH
Conversion result register (ADCR)
Undefined
Mode register (ADM)
00H
Analog input channel specification register (ADS)
00H
Power-fail comparison mode register (PFM)
00H
A/D converter
Power-fail comparison threshold register (PFT)
00H
Notes 1. During reset input or oscillation stabilization time wait, only the PC contents among the hardware statuses
become undefined. All other hardware statuses remain unchanged after reset.
2. When a reset is executed in the standby mode, the pre-reset status is held even after reset.
3. Do not access VSWC in the current IE environment (IE-78K0-NS, IE-78K0-NS-A, and IE-78K0K1-ET).