18.4.5 Input/Output Pins
Flash memory is controlled by the pins listed in table 18-9.
Table 18-9 Flash Memory Pins
Pin Name
Abbreviation
Input/Output
Function
Programming power
V
PP
Power supply
Apply 12.0 V
Mode 2
MD
2
Input
H8/3048F operating mode
programming
Mode 1
MD
1
Input
H8/3048F operating mode
programming
Mode 0
MD
0
Input
H8/3048F operating mode
programming
Transmit data
TXD
1
Output
Serial transmit data output
Receive data
RXD
1
Input
Serial receive data input
The transmit data and receive data pins are used in boot mode.
18.4.6 Register Configuration
The flash memory is controlled by the registers listed in table 18-10.
Table 18-10 Flash Memory Registers
Address
Name
Abbreviation
R/W
Initial Value
H'FF40
Flash memory control
FLMCR
R/W
*
2
H'00
*
1
register
H'FF42
Erase block register 1
EBR1
R/W
*
2
H'00
*
1
H'FF43
Erase block register 2
EBR2
R/W
*
2
H'00
*
1
H'FF48
RAM control register
RAMCR
R/W
H'70
Notes: 1. The initial value is H'00 in modes 5, 6, and 7 (on-chip flash memory enabled).
2. In modes 1, 2, 3, and 4 (on-chip flash memory disabled), this register cannot be
modified and is always read as H'FF.
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