Status Of Hardware After Reset - NEC PD789860 User Manual

Note 1
Program counter (PC)
Stack pointer (SP)
Program status word (PSW)
EEPROM
RAM
Ports (P0, P2) (output latch)
Port mode registers (PM0, PM2)
Processor clock control register (PCC)
Oscillation stabilization time selection register (OSTS)
8-bit timer
Watchdog timer
Power-on-clear circuit
Bit sequential buffer
Interrupts
Notes 1. While a reset signal is being input, and during the oscillation stabilization time wait, the contents of the
PC will be undefined, while the remainder of the hardware will be the same as after the reset.
2. In standby mode, the RAM enters the hold state after a reset.
µ
3. PD789860 Subseries only
4. This value is 04H only after a power-on-clear reset.
158
CHAPTER 16 RESET FUNCTION
Table 16-1. Status of Hardware After Reset
Hardware
Write control register (EEWC10)
Data memory
General-purpose registers
Note 3
Timer counters (TM30, TM40)
Compare registers (CR30, CR40, CRH40)
Mode control registers (TMC30, TMC40)
Carrier generator output control register (TCA40)
Timer clock selection register (TCL2)
Mode register (WDTM)
Power-on-clear register (POCF1)
Low-voltage detection register (LVIF1)
Low-voltage detection level selection register (LVIS1)
Data registers (BSFRL10, BSFRH10)
Output control register (BSFC10)
Request flag register (IF0)
Mask flag register (MK0)
User's Manual U14826EJ5V0UD
Status After Reset
The contents of the reset
vector table (0000H, 0001H)
are set
Undefined
02H
08H
Note 2
Undefined
Note 2
Undefined
00H
FFH
02H
04H
00H
Undefined
00H
00H
00H
00H
Note 4
00H
00H
00H
Undefined
00H
00H
FFH