參數(shù)資料
型號(hào): MC68HC05C9AP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 145/162頁
文件大?。?/td> 1093K
代理商: MC68HC05C9AP
Serial Communications Interface (SCI)
SCI I/O Registers
MC68HC05C9A Rev. 5.0
Advance Information
MOTOROLA
Serial Communications Interface (SCI)
83
N
O
N-D
I
SC
L
O
SU
R
E
AG
R
EEMENT
R
E
Q
U
IR
ED
9.12.1 SCI Data Register
The SCI data register (SCDR), shown in Figure 9-8, is the buffer for
characters received and for characters transmitted.
9.12.2 SCI Control Register 1
The SCI control register 1 (SCCR1), shown in Figure 9-9, has these
functions:
Stores ninth SCI data bit received and ninth SCI data bit
transmitted
Controls SCI character length
Controls SCI wakeup method
R8 — Bit 8 (Received)
When the SCI is receiving 9-bit characters, R8 is the ninth bit of the
received character. R8 receives the ninth bit at the same time that the
SCDR receives the other eight bits. Resets have no effect on the R8
bit.
Address: $0011
Bit 7
6543
2
1
Bit 0
Read:
SCD7
SDC6
SCD5
SCD4
SCD3
SCD2
SCD1
SCD0
Write:
Reset:
Unaffected by reset
Figure 9-8. SCI Data Register (SCDR)
Address: $000E
Bit 7
6543
2
1
Bit 0
Read:
R8
T8
MWAKE
Write:
Reset:
U
0
U
000
= Unimplemented
U = Undetermined
Figure 9-9. SCI Control Register 1 (SCCR1)
相關(guān)PDF資料
PDF描述
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