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(9) Warnings that Apply to H8/36902, H8/36912 Group Programming
(a) The description given in the hardware manual is “Initial value: 0. Reserved. These bits are always read as
0”. However, the description in the emulator manual is “Always specify 0. These bits are always read as
the specified values”.
Table 8.48 Differences between the H8/36902, H8/36912 Group Products (1)
Target Address Register Name Bits
H'FFE0 Port mode register 1 6, 5, 3, 2, and 0
H'FFE1 Port mode register 5 7, 6, 4 to 0
H'FFF1 System control register 2 6, 1, and 0
H'FFF2 Interrupt edge select register 1 7 ,2, and 1
H'FFF3 Interrupt edge select register 2 4 to 0
H'FFF4 Interrupt enable register 1 6, 2, and 1
H'FFF5 Interrupt enable register 2 7 and 6
H'FFF9 Module standby control register 1 7 and 0
H'FFFA Module standby control register 2 7 to 5, 3 to 0
(b) The hardware manual shows registers at the addresses given below. For these locations, however, the
applicable description in the emulator manual is “Writing has no effect. These bits are always read as
undefined values”, because there are no registers at these locations of the emulator.
Table 8.49 Differences between the H8/36902, H8/36912 Group Products (2)
Target Address Register Name Bits
H’F730 Low-voltage-detection control register 7 to 0
H’F731 Low-voltage-detection status register 7 to 0
H’F734 Clock control/status register 7 to 0
H’F735 RC control register 7 to 0
H’F736 RC trimming data protect register 7 to 0
H’F737 RC trimming data register 7 to 0
H’FFAE Sampling mode register 7 to 0
(c) The H8/36902, H8/36912 group has power-on reset, low-voltage detection, on-chip oscillator and noise
filter of SCI. However, the E6000 emulator does not support these functions.
(d) The initial value of WDON bit of Timer control/status register in H8/36902, H8/36912 group, is ‘1’ in the
hardware manual. When using E6000, however, the initial value is ‘0’, and thus, please write ‘1’ when
you count up the watch dog timer.
Table 8.50 Differences between the H8/36902, H8/36912 Group Products (3)
Target Address Register Name Bits
H’FFC0 Timer control/status register 2
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