NEC mPD780344 Series User Manual page 417

Note 1
Program counter (PC)
Stack pointer (SP)
Program status word (PSW)
RAM
Port (output latch)
Port mode registers (PM0, PM2 to PM4, PM8 to PM11)
Pull-up resistor option registers (PU0, PU2 to PU4)
Pin function switching registers (PF8 to PF11)
Processor clock control register (PCC)
Memory size switching register (IMS)
Internal expansion RAM size switching register (IXS)
Memory expansion mode register (MEM)
Subclock select register (SSCK)
Oscillation stabilization time select register (OSTS)
16-bit timer/event counter 0
8-bit timer/event counters A0, B0
8-bit timer/event counters 50, 51
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. Although the initial value is CFH, use the following value to be set for each version.
µ PD780343, 780353, 780343Y, 780353Y: 46H
µ PD780344, 780354, 780344Y, 780354Y: 48H
µ PD78F0354, 78F0354Y: C8H or value for mask ROM versions
4. Although the initial value is 0CH, use this register with a setting of 0BH.
CHAPTER 21 RESET FUNCTION
Table 21-1. Hardware Statuses After Reset (1/2)
Hardware
Data memory
General-purpose register
Timer counter 0 (TM0)
Capture/compare registers 00, 01 (CR00, CR01)
Prescaler mode register 0 (PRM0)
Mode control register 0 (TMC0)
Capture/compare control register 0 (CRC0)
Output control register 0 (TOC0)
Timer counters (TMA0, TMB0)
Compare registers (CRA0, CRB0, CRHB0)
Mode control registers (TMCA0, TMCB0)
Carrier generator output control register B0 (TCAB0)
Timer counters (TM50, TM51)
Compare registers (CR50, CR51)
Clock select registers (TCL50, TCL51)
Mode control registers (TMC50, TMC51)
User's Manual U15798EJ2V0UD
Status After Reset
Contents of reset vector table
(0000H, 0001H) are set.
Undefined
02H
Note 2
Undefined
Note 2
Undefined
00H
FFH
00H
00H
04H
Note 3
CFH
Note 4
0CH
00H
00H
04H
0000H
Undefined
00H
00H
00H
00H
00H
Undefined
00H
00H
00H
Undefined
00H
00H
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