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NEC PD78058FY(A) User Manual

Page 525

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525

CHAPTER 24 RESET FUNCTION

Table 24-1. Hardware Status After Reset (1/2)

Hardware

Status after Reset

Program counter (PC)

Note 1

The contents of reset vector

tables (0000H and 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 0 to 3, Port 7, 12, 13

00H

(P0 to P3, P7, P12, P13)

Ports 4 to 6 (P4 to P6)

Undefined

Port mode register (PM0 to PM3, PM5 to PM7, PM12, PM13)

FFH

Pull-up resistor option register (PUOH, PUOL)

00H

Processor clock control register (PCC)

04H

Oscillation mode selection register (OSMS)

00H

Memory size switching register (IMS)

Note 3

Internal expansion RAM size switching register (IXS)

Note 4

0AH

Memory expansion mode register (MM)

10H

Oscillation stabilization time select register (OSTS)

04H

16-bit timer/event counter

Timer register (TM0)

00H

Capture/compare register (CR00, CR01)

Undefined

Clock selection register (TCL0)

00H

Mode control register (TMC0)

00H

Capture/compare control register 0 (CRC0)

04H

Output control register (TOC0)

00H

8-bit timer/event counter

Timer register (TM1, TM2)

00H

Compare registers (CR10, CR20)

Undefined

Clock select register (TCL1)

00H

Mode control registers (TMC1)

00H

Output control register (TOC1)

00H

Notes 1. During reset input or oscillation stabilization time wait, only the PC contents among the hardware

statuses become undefined. All other hardware statuses remains unchanged after reset.

2. If there is a reset while in the standby mode, the status before reset is maintained even after reset is

performed.

3. The values after reset depend on the product.

µ

PD78056F, 78056FY : CCH,

µ

PD78058F, 78058FY : CFH,

µ

PD78P058F, 78P058FY: CFH

4. Incorporated only in the

µ

PD78058F, 78058FY, 78P058F, and 78P058FY.

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