參數(shù)資料
型號: MC68HC05P4A
廠商: Motorola, Inc.
英文描述: 28-pin MCU (microcontroller unit) based on the MC68HC05P4(28引腳、基于MC68HC05P4升級的8位微控制器單元)
中文描述: 28引腳單片機(微控制器)的基礎上MC68HC05P4(28引腳,基于MC68HC05P4升級的8位微控制器單元)
文件頁數(shù): 56/102頁
文件大小: 930K
代理商: MC68HC05P4A
Advance Information
MC68HC05P4A — Rev. 6.0
56
Simple Serial Input/Output Port (SIOP)
MOTOROLA
Simple Serial Input/Output Port (SIOP)
the DCOL requires turning the SIOP off then turning it back on. Reset
also clears this bit.
7.4.3 SIOP Data Register
This register is located at address $000C and is both the transmit and
receive data register. This system is not double buffered and any write
to this register will destroy the previous contents. The SDR can be read
at any time, but if a transmission is in progress the results may be
ambiguous. Writes to the SDR while a transmission is in progress can
cause invalid data to be transmitted and/or received. This register can
be read and written only when the SIOP is enabled (SPE = 1).
Address:
$000C
Bit 7
6
5
4
3
2
1
Bit 0
Read:
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Write:
Reset:
Unaffected by reset
Figure 7-5. SIOP Data Register (SDR)
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