參數(shù)資料
型號: PIC16C765-I/PT
廠商: Microchip Technology
文件頁數(shù): 141/165頁
文件大?。?/td> 0K
描述: IC MCU OTP 8KX14 USB 44TQFP
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 160
系列: PIC® 16C
核心處理器: PIC
芯體尺寸: 8-位
速度: 24MHz
連通性: SCI,UART/USART,USB
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 33
程序存儲器容量: 14KB(8K x 14)
程序存儲器類型: OTP
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 4.35 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x8b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-TQFP
包裝: 托盤
產(chǎn)品目錄頁面: 636 (CN2011-ZH PDF)
配用: XLT44PT3-ND - SOCKET TRAN ICE 44MQFP/TQFP
AC164305-ND - MODULE SKT FOR PM3 44TQFP
ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
444-1001-ND - DEMO BOARD FOR PICMICRO MCU
AC164020-ND - MODULE SKT PROMATEII 44TQFP
2000 Microchip Technology Inc.
Preliminary
DS41124C-page 77
PIC16C745/765
11.0
UNIVERSAL SYNCHRONOUS
ASYNCHRONOUS RECEIVER
TRANSMITTER (USART)
The Universal Synchronous Asynchronous Receiver
Transmitter (USART) module is one of the two serial
I/O modules. (USART is also known as a Serial Com-
munications Interface or SCI). The USART can be con-
figured as a full duplex asynchronous system that can
communicate with peripheral devices, such as CRT ter-
minals and personal computers, or it can be configured
as a half duplex synchronous system that can commu-
nicate with peripheral devices, such as A/D or D/A inte-
grated circuits, Serial EEPROMs, etc.
The USART can be configured in the following modes:
Asynchronous (full duplex)
Synchronous - Master (half duplex)
Synchronous - Slave (half duplex)
Bits SPEN (RCSTA<7>) and TRISC<7:6> have to be
set in order to configure pins RC6/TX/CK and RC7/RX/
DT as the Universal Synchronous Asynchronous
Receiver transmitter.
REGISTER 11-1:
TRANSMIT STATUS AND CONTROL REGISTER (TXSTA: 98h)
R/W-0
U-0
R/W-0
R-1
R/W-0
CSRC
TX9
TXEN
SYNC
BRGH
TRMT
TX9D
R
= Readable bit
W = Writable bit
U
= Unimplemented bit,
read as ‘0’
- n = Value at POR reset
bit7
bit0
bit 7:
CSRC: Clock Source Select bit
Asynchronous mode
Don’t care
Synchronous mode
1
= Master mode (Clock generated internally from BRG)
0
= Slave mode (Clock from external source)
bit 6:
TX9: 9-bit Transmit Enable bit
1
= Selects 9-bit transmission
0
= Selects 8-bit transmission
bit 5:
TXEN: Transmit Enable bit
1
= Transmit enabled
0
= Transmit disabled
Note: SREN/CREN overrides TXEN in SYNC mode.
bit 4:
SYNC: USART Mode Select bit
1
= Synchronous mode
0
= Asynchronous mode
bit 3:
Unimplemented: Read as '0'
bit 2:
BRGH: High Baud Rate Select bit
Asynchronous mode
1
= High speed
0
= Low speed
Synchronous mode
Unused in this mode
bit 1:
TRMT: Transmit Shift Register Status bit
1
= TSR empty
0
= TSR full
bit 0:
TX9D: 9th bit of transmit data. (Can be used for parity.)
745cov.book Page 77 Wednesday, August 2, 2000 8:24 AM
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