
486
CHAPTER 19 RESET FUNCTION
Table 19-2. State of Hardware after Reset (1/2)
Hardware
State after Reset
Program counter (PC)
Contents of reset vector table
(0000H, 0001H) are set
Stack pointer (SP)
Undefined
Note
Program status word (PSW)
02H
On-chip RAM
Data memory
Undefined
Note
General-purpose register
Port
Port 0 to port 9
Undefined (high impedance)
Mode registers (PM0 to PM6, PM9)
FFH
Mode control registers (PMC1 to PMC3, PMC9)
00H
Port read control register (PRDC)
Pull-up resistor option register (PUOL, PUOH)
Port 0 buffer register (P0L)
Undefined
Real-time output port control register (RTPC)
00H
Timer/counter
Timer registers (TM0 to TM4)
0000H
Capture/compare registers (CC00 to CC03)
Undefined
Compare registers (CM10, CM11, CM20, CM21, CM30, CM31, CM40, CM41)
Timer unit mode registers (TUM0, TUM2)
00H
Timer mode control registers (TMC, TMC2, TMC4)
Timer output control registers (TOC0 to TOC2)
Prescaler mode registers (PRM, PRM2, PRM4)
Noise protection control register (NPC)
Interrupt valid edge flag registers (IEF1, IEF2)
Undefined
Watchdog timer mode register (WDM)
00H
A/D converter
A/D converter mode register (ADM)
A/D conversion result registers (ADCR0 to ADCR7, ADCR0H to ADCR7H)
Undefined
Serial interface
Asynchronous serial interface mode registers (ASIM, ASIM2)
00H
Asynchronous serial interface status registers (ASIS, ASIS2)
Serial receive buffers (RXB, RXB2)
Undefined
Serial transmit shift registers (TXS, TXS2)
Clocked serial interface mode registers (CSIM1, CSIM2)
00H
Serial shift registers (SIO1, SIO2)
Undefined
Baud rate generator control registers (BRGC, BRGC2)
00H
External interrupt mode registers (INTM0, INTM1)
Note
If the HALT, STOP, or IDLE mode is released by using the RESET input, the values immediately before each mode
has been set are retained.