tmp89fh42l TOSHIBA Semiconductor CORPORATION, tmp89fh42l Datasheet - Page 334

• Manufacturer Part Number: tmp89fh42l
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

21.1
Flash Memory Control
RA006
Flash memory standby control register
Port input control register (this register works only in serial PROM mode)
(0x0FD2)
(0x0FD3)
FLSSTB
SPCR
Note 1: A value can be written to FSTB only by using a program that resides in RAM. A value written using a program residing in
Note 2: If FSTB is set to "1", do not execute instructions to fetch or read data from or write data to the flash memory. If they are
Note 3: If an instruction to read FLSSTB is executed, "0" is read from bits 7 through 0.
Note 1: A read or write can be performed on the SPCR register only in serial PROM mode. If a write is performed on this register
Note 2: All I/O ports are controlled by PIN0, except the ports RXD0, TXD0 and SCLK0 which are used in serial PROM mode. By
Read/Write
Read/Write
Bit Symbol
Bit Symbol
After reset
the flash memory will be invalidated.
executed, a flash standby reset will occur.
After reset
in MCU mode, the port input control does not function. If a read is performed on the SPCR register in MCU mode, "0" is
read from bits 7 through 0.
using PIN1, the SCLK0 pin can be configured separately from other pins.
FSTB
PIN1
PIN0
Flash memory standby control
Port input control (SCLK0 pin) in se-
rial PROM mode
Port input control (except RXD0,
TXD0 and SCLK0) in serial PROM
mode
R
R
7
0
7
0
R
R
6
0
6
1
R
R
5
0
5
0
Page 320
0
1
0
1
0
1
Disable flash memory standby
Enable flash memory standby
Port input disabled
Port input enabled
Port input disabled
Port input enabled
R
R
4
0
4
0
In serial PROM mode
R
R
3
0
3
0
R
R
0
2
0
2
Input enabled for all ports
Nonfunctional whatever settings
are made
"0" is read
In MCU mode
PIN1
R/W
R
1
0
1
0
TMP89FH42L
FSTB
PIN0
R/W
W
0
0
0
0