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PIC16F877A Datasheet, PDF (195/234 Pages) Microchip Technology – 28/40-pin Enhanced FLASH Microcontrollers | |||
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PIC16F87XA
FIGURE 17-17: USART SYNCHRONOUS TRANSMISSION (MASTER/SLAVE) TIMING
RC6/TX/CK
pin
RC7/RX/DT
pin
121
121
120
122
Note: Refer to Figure 17-3 for load conditions.
TABLE 17-12: USART SYNCHRONOUS TRANSMISSION REQUIREMENTS
Param
No.
Symbol
Characteristic
Min Typâ Max Units Conditions
120 TCKH2DTV SYNC XMIT (MASTER & SLAVE)
Clock High to Data Out Valid
Standard(F)
â â 80 ns
Extended(LF) â â 100 ns
121 TCKRF
Clock Out Rise Time and Fall Time Standard(F)
â â 45 ns
(Master mode)
Extended(LF) â â 50 ns
122 TDTRF
Data Out Rise Time and Fall Time Standard(F)
â â 45 ns
Extended(LF) â â 50 ns
â Data in âTypâ column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
FIGURE 17-18: USART SYNCHRONOUS RECEIVE (MASTER/SLAVE) TIMING
RC6/TX/CK
pin
RC7/RX/DT
pin
125
126
Note: Refer to Figure 17-3 for load conditions.
TABLE 17-13: USART SYNCHRONOUS RECEIVE REQUIREMENTS
Param
No.
Symbol
Characteristic
Min Typâ Max Units Conditions
125
TDTV2CKL SYNC RCV (MASTER & SLAVE)
Data Setup before CK â (DT setup time) 15
â
â
ns
126
TCKL2DTL Data Hold after CK â (DT hold time)
15
â
â
ns
â Data in âTypâ column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
 2003 Microchip Technology Inc.
DS39582B-page 193
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