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PIC17C752-08/CL Datasheet(PDF) 259 Page - Microchip Technology

Part # PIC17C752-08/CL
Description  High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D
PDF  328 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC17C752-08/CL Datasheet(HTML) 259 Page - Microchip Technology

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© 1998 Microchip Technology Inc.
Preliminary
DS30289A-page 259
PIC17C7XX
FIGURE 20-17: USART ASYNCHRONOUS MODE START BIT DETECT
TABLE 20-17: USART ASYNCHRONOUS MODE START BIT DETECT REQUIREMENTS
FIGURE 20-18: USART ASYNCHRONOUS RECEIVE SAMPLING WAVEFORM
TABLE 20-18: USART ASYNCHRONOUS RECEIVE SAMPLING REQUIREMENTS
Param
No.
Sym
Characteristic
Min
Typ†
Max
Units
Conditions
120A
TdtL2ckH
Time to ensure that the RX pin is sampled low
—
—
TCY §ns
121A
TdtRF
Data rise time and fall time
Receive
—
—
Note 1
ns
Transmit
—
—
40 †
ns
123A
TckH2bckL
Time from RX pin sampled low to first rising edge
of x16 clock
——
TCY §ns
† These parameters are for design guidance only and are not tested.
§ This specification ensured by design.
Note 1: Schmitt trigger will determine logic level.
Param
No.
Sym
Characteristic
Min
Typ
†
Max
Units
Conditions
125A
TdtL2ckH
Setup time of RX pin to first data sam-
pled
TCY §—
—
ns
126A
TdtL2ckH
Hold time of RX pin from last data sam-
pled
TCY §—
—
ns
§ This specification ensured by design.
RX
x16 CLK
Q2, Q4 CLK
Start bit
(RX/DT pin)
121A
120A
123A
RX
baud CLK
x16 CLK
Start bit
Bit0
Samples
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
Baud CLK for all but start bit
(RX/DT pin)
125A
126A



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