HD64F2149 Datasheet, PDF (723/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

• Auto-Erase Mode
Auto-erase mode supports automatic erasing of the entire flash memory. Status polling is used
to confirm the end of auto-erasing.
• Status Read Mode
Status polling is used for auto-programming and auto-erasing, and normal termination can be
confirmed by reading the FO6 signal. In status read mode, error information is output if an
error occurs.
Table 22.12 Settings for Each Operating Mode in Programmer Mode
Pin Names
Mode
CE
OE
WE
FO0 to FO7
FA0 to FA17
Read
L
L
H
Data output
Ain
Output disable
L
H
H
Hi-z
X
Command write
L
H
L
Data input
Ain*²
Chip disable*¹
H
X
X
Hi-z
X
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 22.13 Programmer Mode Commands
Command Name
Number
of Cycles Mode
1st Cycle
Address Data
2nd Cycle
Mode Address Data
Memory read mode 1 + n
Write X
H'00
Read RA
Dout
Auto-program mode 129
Write X
H'40
Write WA
Din
Auto-erase mode
2
Write X
H'20
Write X
H'20
Status read mode 2
Write X
H'71
Write X
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).
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