参数资料
型号: M38K09F8LHP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64
文件页数: 88/133页
文件大小: 1359K
代理商: M38K09F8LHP
38K0 Group
Rev.3.00
Oct 05, 2006
page 58 of 129
REJ03B0192-0300
EXB Related Registers
The EXB related registers are shown below.
b7
b0
CPU channel receive enable bit
CPU channel transmit enable bit
Memory channel operation
enable bit
Not used
RXB_ENB
TXB_ENB
MC_ENB
b7:b3
0
EXB interrupt source enable register (EXBICON) [address 003016]
(Note)
0
000
Bit name
Bit symbol
At reset
Function
H/W
S/W
0 : Operation disabled (Interrupt disabled)
1 : Operation enabled (Receive buffer full interrupt enabled)
0 : Operation disabled (Interrupt disabled)
1 : Operation enabled (Transmit buffer empty interrupt enabled)
0 : Operation disabled (Memory channel operation end
interrupt disabled)
1 : Operation enabled (Memory channel operation end
interrupt disabled)
Write “0” when writing.
“0” is read when reading.
O
–: State remaining
W
R
Note: Do not set each bit simultaneously.
Fig. 79 Structure of EXB interrupt source enable register
b7
b0
RXB_FULL
TXB_EMPTY
MC_STS
[1:0]
(Note 2)
b7:b4
000
0
0
(Note 3)
0
(Note 4)
0
EXB interrupt source register (EXBIREQ) [address 003116] (Note 1)
Bit name
Bit symbol
At reset
Function
H/W
S/W
O
O
–: State remaining
Receive buffer full bit
Transmit buffer empty bit
Memory channel status bits
Not used
0 : Receive buffer empty
1 : Receive buffer full
0 : Transmit buffer full
1 : Transmit buffer empty
b3b2
0 0 : Memory channel operation stopped
0 1 : Memory channel being operating;
No external access
1 0 : Memory channel being operating;
External accessing
1 1 : Memory channel operation end; Memory
channel operation end interrupt generated
Write “0” when writing.
“0” is read when reading.
Notes 1: When the the ExA1 pin control bit of external I/O configuration register is “1”, the external MCU bus can read this
register contents by setting the ExA1 pin to “H”.
2: The memory channel status bits indicate the status of memory channel. In MC_ENB = “0” these bits are always
“002”. When the memory channel operation ends, these bits are set to “112” and the memory channel operation
end interrupt is generated.
These bits can be read out during operation, so that it will show that whether the external MCU bus is accessing
or not.
3: This bit is cleared to “0” when reading the transmit/receive buffer register in the CPU channel receive enable bit =
“1” or when the CPU channel receive enable bit is “0”.
4: This bit is cleared to “0” when writing to the transmit/receive buffer register in the CPU channel transmit enable bit
= “1” or when the CPU channel transmit enable bit is “0”.
W
R
Fig. 80 Structure of EXB interrupt source register
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