HD6432142 datasheet(717/1177 Pages) RENESAS

717 / 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 673 of 1130

REJ09B0327-0400

Table 22.11 Settings for Each Operating Mode in Programmer Mode

Pin Names

Mode

FO0 to FO7

FA0 to FA17

Read

Data output

Ain

Output disable

Hi-Z

Command write

Data input

Ain*

Chip disable*

XXHi-Z

Notes: 1. Chip disable is not a standby state; internally, it is an operation state.

2. Ain indicates that there is also address input in auto-program mode.

Table 22.12 Programmer Mode Commands

1st Cycle

2nd Cycle

Command Name

Number

of Cycles

Mode

Address

Data

Mode

Address

Data

Memory read mode

1 + n

Write

H'00

Read

Dout

Auto-program mode

129

Write

H'40

Write

Din

Auto-erase mode

Write

H'20

Write

H'20

Status read mode

Write

H'71

Write

H'71

Notes: 1. In auto-program mode, 129 cycles are required for command writing by a simultaneous

128-byte write.

2. In memory read mode, the number of cycles depends on the number of address write

cycles (n).

22.10.4

Memory Read Mode

• After the end of an auto-program, auto-erase, or status read operation, the command wait state

is entered. To read memory contents, a transition must be made to memory read mode by

means of a command write before the read is executed.

• Command writes can be performed in memory read mode, just as in the command wait state.

• Once memory read mode has been entered, consecutive reads can be performed.

• After power-on, memory read mode is entered.

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