Page 236
20. Serial PROM Mode
20.3 Serial PROM Mode Setting
T
5CL8
20.3.4 Activating the Serial PROM Mode
The following is a procedure to activate the serial PROM mode. " Figure 20-4 Serial PROM Mode Timing "
shows a serial PROM mode timing.
1. Supply power to the VDD pin.
2. Set the
RESET
pin to low.
3. Set the TEST pin and BOOT/RXD1 pins to high.
4. Wait until the power supply and clock oscillation stabilize.
5. Set the
RESET
pin to high.
6. Input the matching data (5AH) to the BOOT/RXD1 pin after setup sequence. For details of the setup
timing, refer to " 20.15 UART Timing ".
Figure 20-4 Serial PROM Mode Timing
VDD
TEST(Input)
RESET(Input)
PROGRAM
Setup time for serial PROM mode (Rxsup)
High level setting
Matching data
don't care
Reset mode
Serial PROM mode
input
BOOT/RXD1 (Input)
Содержание CEM2100/00
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Страница 156: ...Page 34 2 Operational Description 2 3 Reset Circuit T5CL8 ...
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