Datasheet

CHAPTER 20 RESET FUNCTION
User’s Manual U18698EJ1V0UD
475
Table 20-2. 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 (P1 to P4, P10 to P12, P14, P15) (output latches) 00H
Port mode registers (PM1 to PM4, PM10 to PM12, PM14, PM15) FFH
Pull-up resistor option registers (PU1, PU3, PU4, PU10 to PU12, PU14, PU15) 00H
Port function register (PF1) 00H
Port function register (PF2) 00H
Port function register (PFALL) 00H
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
Internal high-speed oscillation trimming register (HIOTRM) 10H
Timer counters 00 (TM00) 0000H
Capture/compare registers 000, 010 (CR000, CR010) 0000H
Mode control registers 00 (TMC00) 00H
Prescaler mode registers 00 (PRM00) 00H
Capture/compare control registers 00 (CRC00) 00H
16-bit timer/event
counters 00
Timer output control registers 00 (TOC00) 00H
Timer counters 50, 51, 52 (TM50, TM51, TM52) 00H
Compare registers 50, 51, 52 (CR50, CR51, CR52) 00H
Timer clock selection registers 50, 51, 52 (TCL50, TCL51, TCL52) 00H
8-bit timer/event
counters 50, 51, 52
Mode control registers 50, 51, 52 (TMC50, TMC51, TMC52) 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) after a reset release are constant
(IMS = CFH) in all the 78K0/LC3 products, 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
(78K0/LC3)
IMS ROM
Capacity
Internal High-Speed
RAM Capacity
μ PD78F0400, 78F0410 42H 8 KB 512 bytes
μ PD78F0401, 78F0411 04H 16 KB 768 bytes
μ PD78F0402, 78F0412 C6H 24 KB
μ PD78F0403, 78F0413 C8H 32 KB
1 KB