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CHAPTER 20 RESET FUNCTION
Preliminary User’s Manual U13420EJ2V0UM00
Table 20-1. Hardware Statuses after Reset (1/2)
Hardware
Status After Reset
Program counter (PC)
Note 1
Contents of reset vector table
(0000H, 0001H) are set.
Stack pointer (SP)
Undefined
Program status word (PSW)
02H
RAM
Data memory
Undefined
Note 2
General register
Undefined
Note 2
Port (Output latch)
Ports 1 to 3, 7 to 9 (P1 to P3, P7 to P9)
00H
Ports 4 to 6 (P4 to P6)
Undefined
Port mode registers (PM0, PM2 to PM9)
FFH
Pull-up resistor option registers (PU0, PU2 to PU9)
00H
Processor clock control register (PCC)
04H
Memory size switching register (IMS)
CFH
Note 3
Internal expansion RAM size switching register (IXS)
0CH
Note 4
Memory expansion mode register (MEM)
00H
Memory expansion wait setting register (MM)
10H
Oscillation stabilization time selection register (OSTS)
04H
16-bit timer/event
Timer register (TM0)
0000H
counter
Capture/compare register (CR00, CR01)
Undefined
Prescaler mode register (PRM0)
00H
Mode control register (TMC0)
00H
Output control register (TOC0)
00H
8-bit timer/event counter
Timer counters (TM50, TM51)
00H
Compare registers (CR50, CR51)
Undefined
Clock selection registers (TCL50, TCL51)
00H
Mode control register (TMC50, TMC51)
04H
Watch timer
Mode control register (WTM)
00H
Watchdog timer
Clock selection register (WDCS)
00H
Mode register (WDTM)
00H
Notes 1. During reset input or oscillation stabilization time wait, only the PC contents among the hardware
statuses becomes 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
PD780065:
CAH
µ
PD78F0066: CCH or value for mask ROM versions
4. Although the initial value is 0CH, always set 04H.
Содержание mPD780065 Series
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