参数资料
型号: MC68HC705F8B
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 1.8 MHz, MICROCONTROLLER, PDIP56
封装: PLASTIC, SDIP-56
文件页数: 103/126页
文件大小: 1084K
代理商: MC68HC705F8B
MOTOROLA
8-8
MC68HC05F8
MANCHESTER ENCODER/DECODER
8
CIE - Encoding Complete Interrupt Enable Bit
1 (set)
Enable encoding complete interrupt. If this bit is set, interrupt is
generated when the NCC ag is set.
0 (clear) –
Disable the encoding complete interrupt.
DCE - Decoder Enable
1 (set)
Enable the decoder.
0 (clear) –
Disable the decoder. When this bit is cleared, the decoder is reset,
receive and decode function is disabled.
DIE - Decode Interrupt Enable
1 (set)
Enable the decoder interrupt. If this bit is set, interrupt is generated
when the DCF or OVF ag is set.
0 (clear) –
Disable the decoder interrupt.
BR1 & BR0 - Bit Rate Select
These two bits are used to select the transfer bit rate.
8.3.2
MANCD Status Register
NCM - Encoder Data Register Empty Flag
The Encoder Data register empty ag is set to indicate the contents of the Encoder Data register
have been transferred to the encode data shift register. If the NCM bit is clear, it indicates that the
transfer has not yet occurred and a write to the Encode Data register will overwrite the previous
value. This bit is cleared by accessing the MANCD status register (with NCM set), followed by
writing to the Encode Data register. Reset sets the NCM bit.
BR1
BR0
Bit Cycle
Bit rate (3.579MHz crystal)
0
1/8 (E/372)
601
0
1
1/4 (E/372)
1203
1
0
1/2 (E/372)
2405
1
E/372
4810
“bit” refers to bit unit in NRZ format, i.e. one bit is twice the bit
unit in Manchester format. E = internal bus clock
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$2C
NCM
NCC
DCF
OVF
1100 ----
TPG
76
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For More Information On This Product,
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