tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 343

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA002
22.5 Activating the Serial PROM Mode
refer to "22.14.1 Reset timing".
Activate the serial PROM mode by performing the following procedure. For information on the detailed timing,
1. Supply power to the VDD pin.
2. Set the
3. Set the RXD0/SI0/P21 and TXD0/SO0/P20 pins to high.
4. Wait until the power supply and clock oscillation stabilize.
5. Set the
6. Input the matching data 0x86 or 0x30 to the RXD0/SI0/P21 pins after the setup period has elapsed.
RESET
RESET
and MODE pins to low.
and MODE pins from low to high.
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