參數(shù)資料
型號: MC68HC705C9AVFNE
廠商: Freescale Semiconductor
文件頁數(shù): 85/118頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 352 BYTES RAM 44-PLC
標準包裝: 26
系列: HC05
核心處理器: HC05
芯體尺寸: 8-位
速度: 2.1MHz
連通性: SCI,SPI
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 24
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: OTP
RAM 容量: 352 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 105°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
SCI I/O Registers
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
69
FE — Receiver Framing Error Flag
This clearable, read-only flag is set when there is a logic 0 where a stop bit should be in the character
shifted into the receive shift register. If the received word causes both a framing error and an overrun
error, the OR flag is set and the FE flag is not set. Clear the FE bit by reading the SCSR and then
reading the SCDR.
1 = Framing error
0 = No framing error
9.13.5 Baud Rate Register
The baud rate register (BAUD), shown in Figure 9-12, selects the baud rate for both the receiver and the
transmitter.
SCP1 — SCP0–SCI Prescaler Select Bits
These read/write bits control prescaling of the baud rate generator clock, as shown in Table 9-1. Reset
clears both SCP1 and SCP0.
SCR2 — SCR0–SCI Baud Rate Select Bits
These read/write bits select the SCI baud rate, as shown in Table 9-2. Resets have no effect on the
SCR2–SCR0 bits.
$000D
Bit 7
6543
2
1
Bit 0
Read:
SCP1
SCP0
SCR2
SCR1
SCR0
Write:
Reset:
0
U
= Unimplemented
U = Undetermined
Figure 9-12. Baud Rate Register (BAUD)
Table 9-1. Baud Rate Generator Clock Prescaling
SCP[1:0]
Baud Rate Generator Clock
00
Internal Clock
÷ 1
01
Internal Clock
÷ 3
10
Internal Clock
÷ 4
11
Internal Clock
÷ 13
Table 9-2. Baud Rate Selection
SCR[2:0]
SCI Baud Rate (Baud)
000
Prescaled Clock
÷ 1
001
Prescaled Clock
÷ 2
010
Prescaled Clock
÷ 4
011
Prescaled Clock
÷ 8
100
Prescaled Clock
÷ 16
101
Prescaled Clock
÷ 32
110
Prescaled Clock
÷ 64
111
Prescaled Clock
÷ 128
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