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R01UH0336EJ0102 Rev.1.02
Page 248 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 6 Memory Modules
6.5 Option-Setting Bytes
The “option bytes” specify product operation. Values of these bytes are
programmed by using the dedicated flash programmer or a function for writing
to them.
Operation of the product with option bytes erased is not guaranteed.
For details, refer to Section 6 OPBT0 - Option Byte Verification Register.
Caution
When the chip is erased, the FOP (option byte) setting is also initialized
(HEAPCLK = 48 MHz, PCLK = 1/4 HEAPCLK). Therefore, set the serial
communication rate within the range shown below and re-set the FOP.
• One-line UART communications
Baud rate
≤
750 kbps
• Three-line CSI-HS communications
FPCK
≤
2 MHz