Status Of Hardware After Reset - NEC PD789488 User Manual

Note 1
Program counter (PC)
Stack pointer (SP)
Program status word (PSW)
RAM Data memory
General-purpose registers
Note 3
Ports (P0 to P3, P5, P8 ) (output latches)
Port mode registers (PM0 to PM3, PM5, PM8
Port function registers (PF7, PF8)
Pull-up resistor option registers (PUB0 to PUB3)
Processor clock control register (PCC)
Subclock oscillation mode register (SCKM)
Subclock selection register (SSCK)
Subclock control register (CSS)
Oscillation stabilization time selection register (OSTS)
16-bit timer 20 Timer counter (TM20)
Compare register (CR20)
Mode control register (TMC20)
Capture register (TCP20)
8-bit timer 50, 60, 61 Timer counters (TM50, TM60, TM61)
Compare registers (CR50, CR60, CRH60, CR61, CRH61)
Mode control registers (TMC50, TMC60, TMC61)
Carrier generator output control register (TCA60)
Watch timer Mode control register (WTM)
Interrupt time selection register (WTIM)
Watchdog timer Clock selection register (WDCS)
Mode register (WDTM)
Serial interface 20 Serial operation mode register (CSIM20)
Asynchronous serial interface mode register (ASIM20)
Asynchronous serial interface status register (ASIS20)
Baud rate generator control register (BRGC20)
Transmit shift register (TXS20)
Receive buffer register (RXB20)
Notes 1. While a reset signal is being input, and during the oscillation stabilization period, only the contents of the
PC will be undefined; the remainder of the hardware will be the same state as after reset.
2. In standby mode, RAM enters the hold state after reset.
3. Port 8 is used only when the port function is specified by a mask option or port function register (refer
to CHAPTER 20 MASK OPTIONS and 4.3 (3) Port function registers).
4. The register is set to 00H only by RESET input.
CHAPTER 18 RESET FUNCTION
Table 18-1. Status of Hardware After Reset (1/2)
Hardware
Note 3
)
User's Manual U15331EJ4V1UD
Status After Reset
Contents of reset
vector table (0000H,
0001H) set
Undefined
02H
Note 2
Undefined
Note 2
Undefined
00H
FFH
00H
00H
02H
00H
Note 4
Retained
00H
04H
0000H
FFFFH
00H
Undefined
00H
Undefined
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
FFH
Undefined
317