tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 366

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

TMP89FM42A
22.5
Activating the Serial PROM Mode
Activate the serial PROM mode by performing the following procedure. For information on the detailed timing,
refer to "22.14.1 Reset timing".
1. Supply power to the VDD pin.
2. Set the RESET and MODE pins to low.
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 RESET and MODE pins from low to high.
6. Input the matching data 0x86 or 0x30 to the RXD0/SI0/P21 pins after the setup period has elapsed.
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