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H8/3002 Datasheet(PDF) 426 Page - Renesas Technology Corp |
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H8/3002 Datasheet(HTML) 426 Page - Renesas Technology Corp |
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426 / 700 page  Writing to RSTCSR: RSTCSR must be written by a word transfer instruction. It cannot be written by byte transfer instructions. Figure 12-3 shows the format of data written to RSTCSR. To write 0 in the WRST bit, the write data must have H'A5 in the upper byte and H'00 in the lower byte. The H'00 in the lower byte clears the WRST bit in RSTCSR to 0. To write to the RSTOE bit, the upper byte must contain H'5A and the lower byte must contain the write data. Writing this word transfers a write data value into the RSTOE bit. Figure 12-3 Format of Data Written to RSTCSR Reading TCNT, TCSR, and RSTCSR: These registers are read like other registers. Byte access instructions can be used. The read addresses are H'FFA8 for TCSR, H'FFA9 for TCNT, and H'FFAB for RSTCSR, as listed in table 12-3. Table 12-3 Read Addresses of TCNT, TCSR, and RSTCSR Address* Register H'FFA8 TCSR H'FFA9 TCNT H'FFAB RSTCSR Note: * Lower 16 bits of the address. 15 8 7 0 H'A5 H'00 Address H'FFAA* 15 8 7 0 H'5A Write data Address H'FFAA* Writing 0 in WRST bit Writing to RSTOE bit Note: Lower 16 bits of the address. * 412 |
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