h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 970

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 21C ROM (H8S/2635 Group)
Table 21C-15
Notes: 1. Chip disable is not a standby state; internally, it is an operation state.
Table 21C-16
Notes: 1. In auto-program mode, 129 cycles are required for command writing by a simultaneous
21C.13.3 Memory Read Mode
1. After completion of auto-program/auto-erase/status read operations, a transition is made to the
2. In memory read mode, command writes can be performed in the same way as in the command
3. Once memory read mode has been entered, consecutive reads can be performed.
4. After powering on, memory read mode is entered.
Rev. 6.00 Feb 22, 2005 page 910 of 1484
REJ09B0103-0600
Mode
Read
Output disable
Command write
Chip disable *
Command Name
Memory read mode
Auto-program mode
Auto-erase mode
Status read mode
command wait state. When reading memory contents, a transition to memory read mode must
first be made with a command write, after which the memory contents are read.
wait state.
2. Ain indicates that there is also address input in auto-program mode.
3. For command writes in auto-program and auto-erase modes, input a high level to the
2. In memory read mode, the number of cycles depends on the number of address write
FWE pin.
128-byte write.
cycles (n).
1
Settings for Various Operating Modes in Programmer Mode
Programmer Mode Commands
FWE
H or L
H or L
H or L *
H or L
Number
of Cycles
1 + n
129
2
2
3
C E
L
L
L
H
Mode
Write
Write
Write
Write
O E
L
H
H
X
1st Cycle
X
Address Data
X
X
X
Pin Names
W E
H
H
L
X
H'00
H'40
H'20
H'71
Mode
Read
Write
Write
Write
I/O7 to I/O0
Data output
Hi-Z
Data input
Hi-Z
2nd Cycle
Address Data
RA
WA
X
X
A18 to A0
Ain *
X
Ain *
X
2
2
Dout
Din
H'20
H'71