HD6432142 datasheet(692/1177 Pages) RENESAS

692 / 1177 page

Section 22 ROM (Mask ROM Version, H8S/2148 F-ZTAT, H8S/2147N F-ZTAT, H8S/2144 F-ZTAT, and H8S/2142 F-ZTAT)

Rev. 4.00 Sep 27, 2006 page 648 of 1130

REJ09B0327-0400

22.4.4

Pin Configuration

The flash memory is controlled by means of the pins shown in table 22.3.

Table 22.3

Flash Memory Pins

Pin Name

Abbreviation

I/O

Function

Reset

RES

Input

Reset

Mode 1

MD1

Input

Sets MCU operating mode

Mode 0

MD0

Input

Sets MCU operating mode

Port 92

P92

Input

Sets MCU operating mode when MD1 = MD0 = 0

Port 91

P91

Input

Sets MCU operating mode when MD1 = MD0 = 0

Port 90

P90

Input

Sets MCU operating mode when MD1 = MD0 = 0

Transmit data

TxD1

Output

Serial transmit data output

Receive data

RxD1

Input

Serial receive data input

22.4.5

The registers used to control the on-chip flash memory when enabled are shown in table 22.4.

In order for these registers to be accessed, the FLSHE bit must be set to 1 in STCR.

Table 22.4

Flash Memory Registers

Abbreviation

R/W

Initial Value

Address*

Flash memory control register 1

FLMCR1*

R/W*

H'80

H'FF80*

Flash memory control register 2

FLMCR2*

R/W*

H'00*

H'FF81*

Erase block register 1

EBR1*

R/W*

H'00*

H'FF82*

Erase block register 2

EBR2*

R/W*

H'00*

H'FF83*

Serial/timer control register

STCR

R/W

H'00

H'FFC3

Notes: 1. Lower 16 bits of the address.

2. Flash memory registers share addresses with other registers. Register selection is

performed by the FLSHE bit in the serial/timer control register (STCR).

3. In modes in which the on-chip flash memory is disabled, a read will return H'00, and

writes are invalid.

4. The SWE bit in FLMCR1 is not set, these registers are initialized to H'00.

5. FLMCR1, FLMCR2, EBR1, and EBR2 are 8-bit registers. Only byte accesses are valid

for these registers, the access requiring 2 states. These registers are used only in the

flash memory version. In the mask ROM version, a read at any of these addresses will

return an undefined value, and writes are invalid.

HD6432142 Datasheet(PDF) 692 Page - Renesas Technology Corp

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