h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 814
h8s-2635
Manufacturer Part Number
h8s-2635
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2635.pdf
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Section 21A ROM (H8S/2636 Group)
Bit 7—Power-Down Disable (PDWND): Enables or disables a transition to the flash memory
power-down mode when the LSI switches to subactive mode. For details, see section 21A.14,
Flash Memory and Power-Down States.
The subactive mode can be used in the U-mask version only.
When writing to this bit in other versions, be sure to write 0.
Bits 6 to 0—Reserved: These bits always read 0.
21A.8 On-Board Programming Modes
When pins are set to on-board programming mode and a reset-start is executed, a transition is
made to the on-board programming state in which program/erase/verify operations can be
performed on the on-chip flash memory. There are two on-board programming modes: boot mode
and user program mode. The pin settings for transition to each of these modes are shown in table
21A-9. For a diagram of the transitions to the various flash memory modes, see figure 21A-3.
Table 21A-9 Setting On-Board Programming Modes
Mode
Boot mode
User program mode
Rev. 6.00 Feb 22, 2005 page 754 of 1484
REJ09B0103-0600
Bit 7: PDWND
0
1
Description
Transition to flash memory power-down mode enabled
Transition to flash memory power-down mode disabled
Expanded mode
Single-chip mode
Expanded mode
Single-chip mode
FWE
1
1
MD2
0
0
1
1
MD1
1
1
1
1
(Initial value)
MD0
0
1
0
1
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