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參數(shù)資料
| 型號： | 7643 |
| 英文描述： | IrDA. protocol handler plus endec for DCE Apps, -40C to +85C, 18-SOIC 300mil, TUBE |
| 中文描述： | 7643Group數(shù)據(jù)表數(shù)據(jù)表1369K/JUL.30.03 |
| 文件頁數(shù)： | 31/120頁 |
| 文件大?。?/td> | 1369K |
| 代理商： | 7643 |
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Rev.1.00 Jul 30, 2003 page 31 of 119
7643 Group
CTS (Clear-to-Send) Function
As a transmitter, the UART can be configured to recognize the
Clear-to-Send (CTS) input as a handshaking signal. This is en-
abled by setting the CTS Function Enable Bit (bit 5 of UCON) to
“1”. If CTS function is enabled, even when transmission is enabled
and the UART transmit buffer register is filled with the data, the
CTS pin.
Figures 25 and 26 show the UART transmit timings.
UTXD output (P8
4
/UTXD)
D
0
D
1
SP
ST
D
2
D
3
D
4
D
5
D
6
D
7
P
ST
SP
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
P
CTS pin
(P8
6
/CTS)
Transfer clock
Tranmit enable bit
Transmit buffer
empty flag
Transmit complete flag
Data set into UART transmit buffer register 1
Data transferring from UART
transmit buffer register 1 to Transmit shift register 1
Halt due to CTS = “H”
Halt due to Tranmit
enable bit = “0”
This timing applying to the conditions:
Character length = 8 bits
Parity enabled
1 stop bit
UART Receive Operation
Reception is enabled when the Receive Enable Bit is “1”. Detec-
tion of the start bit makes transfer clocks generated and the data
reception starts in the LSB first.
When using 9-bit character length, read the received data from the
UART receive buffer register 2 (high-order byte) first before the
UART receive buffer register 1 (low-order byte).
Reception requires the following setup:
(1) Define a baud rate by setting a value n (n = 0 to 255) into
UART baud rate generator (addresses 0031
16
).
(2) Set the Receive Initialization Bit (bit 3 of UCON) to “1”.
(3) Configure the data format and clock selection by setting the
UART mode register.
(4) Set the RTS Function Enable Bit (bit 5 of UCON) if RTS func-
tion will be used.
(5) Set the Receive Enable Bit (bit 1 of UCON) to “1”.
Fig. 25 UART transmit timing (CTS function enabled)
UART Transmit Operation
Transmission starts when the Transmit Enable Bit is “1” and the
Transmit Buffer Empty Flag is “0”. Additionally, when CTS function
enabled, the CTS pin must be “L” to be started. The data in which
Start Bit and Stop Bit or Parity Bit are also added is transmitted
from the low-order byte sequentially. When using 9-bit character
length, set the data into the UART transmit buffer register 2 (high-
order byte) first before the UART transmit buffer register 1
(low-order byte).
Once the transmission starts, the Transmit Enable Bit, the Trans-
mit Buffer Empty Flag and the CTS pin state (when this is
enabled) could not be checked until the transmission in progress
has ended.
Transmission requires the following setup:
(1) Define a baud rate by setting a value n (n = 0 to 255) into
UART baud rate generator (addresses 0031
16
).
(2) Set the Transmit Initialization Bit (bit 2 of UCON) to “1”. This
will set the UART status register to “03
16
”.
(3) Select the interrupt source with the Transmit Interrupt Source
Select Bit (bit 4 of UCON).
(4) Configure the data format and clock selection by setting the
UART mode register.
(5) Set the CTS Function Enable Bit (bit 5 of UCON) if CTS func-
tion will be used.
(6) Set the Transmit Enable Bit (bit 0 of UCON) to “1”.
If updating a value of UART baud rate generator while the data is
being transmitted, be sure to disable the transmission before up-
dating. If the former data remains in the UART transmit buffer
registers 1 and 2 at retransmission, an undefined data might be
output.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 764-3"x36yd-Red | 功能描述:膠帶 764 RED 3X36 YD BULK RoHS:否 制造商:3M Electronic Specialty 產品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds |
| 764-3"x36yd-White | 功能描述:膠帶 WHITE 3X36YD BULK RoHS:否 制造商:3M Electronic Specialty 產品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds |
| 764-3"x36yd-Yellow | 功能描述:膠帶 764 YELLOW 3X36 YD BULK RoHS:否 制造商:3M Electronic Specialty 產品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds |
| 7643_06 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER |
| 76430 | 制造商:Brady Corporation 功能描述:TAPE, BARRICADE, BLACK/PHOSPHORESCENT, 2INX5YD; Tape Type:Safety, Hazard Warning; Tape Backing Material:Polyester Film; Tape Width - Metric:50.8mm; Tape Width - Imperial:2"; Tape Length - Metric:4.572m; Tape Length - Imperial:5yard ;RoHS Compliant: NA |
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