CHAPTER 15 RESET FUNCTION
Preliminary User’s Manual U19014EJ1V0UD
426
Table 15-2. Hardware Statuses After Reset Acknowledgment (1/3)
Hardware After
Reset
Acknowledgment
Note 1
Program counter (PC)
The contents of the
reset vector table
(0000H, 0001H) are
set.
Stack pointer (SP)
Undefined
Program status word (PSW)
02H
Data memory
Undefined
Note 2
RAM
General-purpose registers
Undefined
Note 2
Port registers (P0, P1, P3, P6, P12) (output latches)
00H
Port mode registers (PM0, PM1, PM3, PM6, PM12)
FFH
Pull-up resistor option registers (PU0, PU1, PU3, PU12)
00H
Internal expansion RAM size switching register (IXS)
0CH
Note 3
Internal memory size switching register (IMS)
CFH
Note 3
Clock operation mode select register (OSCCTL)
00H
Processor clock control register (PCC)
01H
Internal oscillation mode register (RCM)
80H
Main OSC control register (MOC)
80H
Main clock mode register (MCM)
00H
Oscillation stabilization time counter status register (OSTC)
00H
Oscillation stabilization time select register (OSTS)
05H
PLL control register (PLLC)
00H
USB clock control register (UCKC)
00H
Timer counter 00 (TM00)
0000H
Capture/compare registers 000, 010 (CR000, CR010)
0000H
Mode control register 00 (TMC00)
00H
Prescaler mode register 00 (PRM00)
00H
Capture/compare control register 00 (CRC00)
00H
16-bit timer/event
counter 00
Timer output control register 00 (TOC00)
00H
Timer counters 50, 51 (TM50, TM51)
00H
Compare registers 50, 51 (CR50, CR51)
00H
Timer clock selection registers 50, 51 (TCL50, TCL51)
00H
8-bit timer/event
counters 50, 51
Mode control registers 50, 51 (TMC50, TMC51)
00H
Notes 1.
During reset signal generation 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.
The initial values of the internal memory size switching register (IMS) and internal expansion RAM size
switching register (IXS) after a reset release are fixed (IMS = CFH, IXS = 0CH), regardless of the internal
memory capacity. Therefore, after a reset is released, be sure to set the following values for each
product.
Flash Memory Version
(
µ
PD78F0730)
IMS IXS
µ
PD78F0730 C4H
08H
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