R0E436640CPE00 User’s Manual
4 Hardware Specifications
REJ10J0918-0300 Rev.3.00 February 15, 2007
Page 79 of 102
4.6.3 Precautions for the H8/3687 Series
(1) The hardware manual says “Initial value = 0. These are reserved bits. When read, they always show the value 0.” On
the other hand, the compact emulator stipulates that
these bits must always be set to 0, and that when read, these bits
show the set value.
H’FFE2
Port Mode Register 3
Bits 7, 6, 5
H’FFF5
Interrupt Enable Register 2
Bits 7, 6
H’FFF9
Module Standby Control Register 1
Bits 7, 2
H’FFFA
Module Standby Control Register 2
Bits 6, 5, 3
(2) Although these bits in the hardware manual are reserved bits, the compact emulator stipulates that
these bits must
always be set to 0, and that when read, these bits show the set value.
H’FFFB
Module Standby Control Register 3
Bit 0
(3) The hardware manual says “Initial value = 0. These are reserved bits. When read, they always show the value 0.” On
the other hand, the compact emulator stipulates that
these bits must always be set to 0.
H’FFF7
Interrupt Flag Register 2
Bits 7, 6
(4) Although these bits in the hardware manual are reserved bits, the compact emulator stipulates that
these bits must
always be set to 0.
H’FFE4
Port Control Register 1
Bit 3
H’FFE5
Port Control Register 2
Bits 7, 6, 5
H’FFEA
Port Control Register 7
Bits 7, 3
H’FFEB
Port Control Register 8
Bits 4--0
(5) Although the hardware manual says that registers are located at the addresses shown below, the compact emulator
stipulates that
writing to the addresses has no effect, and that when read, they show indeterminate values.
This is
because no registers exist at these addresses in the compact emulator.
H’F730
Low-voltage-detection Control Register
Bits 7--0
H’F731
Low-voltage-detection Status Register
Bits 7--0
H’FF90
Flash Memory Control Register 1
Bits 7--0
H’FF91
Flash Memory Control Register 2
Bits 7--0
H’FF92
Flash Memory Power Control Register
Bits 7--0
H’FF93
Block Specification Register 1
Bits 7--0
H’FF9B
Flash Memory Enable Register
Bits 7--0
Summary of Contents for R0E436640CPE00
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