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UPD72001C Datasheet(PDF) 18 Page - NEC

Part # UPD72001C
Description  MULTI-PROTOCOL SERIAL CONTROLLERS
PDF  40 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD72001C Datasheet(HTML) 18 Page - NEC

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µPD72001-11, 72001-A8
18
Modem control:
Parameter
Symbol
Condition
Rated Value
Unit
MIN.
MAX.
CTS, DCD, SYNC pulse
High
tWMH
2tCYK
width
Low
tWML
2tCYK
CTS, DCD, SYNC
→ INT delay time
tDMIQ
2tCYK
STRXC, TRXC
↑ → SYNC setup time
TSSYRC
COP external synchronization
0
2
tCYK
Communication control:
Parameter
Symbol
Condition
Rated Value
Unit
MIN.
MAX.
Transmit enable command
tDTETD1
ASYNC, COP
3
tCYC
(WR
↑, CTS ↓) → TXD delay time
tDTETD2
BOP
4
7
tCYC
Receive enable command (DCD
↓)tSRERC
1tCYC
setup time (vs. start bit, STRXC
↑,
TRXC
↑ of sync character)Note
Receive enable command (DCD
↓)tHRCRE1
ASYNC
7
tCYK
hold time (vs. STRXC
↑, TRXC ↑)Note
tHRCRE2
COP
20tCYC
+ 8tCYK
tHRCRE3
BOP
3tCYC
+ 8tCYK
Receive clock (STRXC, TRXC)Note
tHRDRC1
ASYNC
1
Bit
hold time (vs. stop bit, MSB of CRC,
tHRDRC2
COP
22
tCYC
MSB of end flag)
tHRDRC3
BOP
5
tCYC
Receive clock (STRXC, TRXC)Note
tSRCRD1
ASYNC
1
Bit
setup time (vs. start bit, sync character)
tSRCRD2
COP, BOP
1
tCYC
Note Of STRXC and TRXC, the one used as the receive clock.
Crystal oscillation and reset
Parameter
Symbol
Condition
Rated Value
Unit
MIN.
MAX.
XI1 input cycle time
tCYX
90
2000
ns
RESET pulse width
tWRSL
2tCYK
Caution The system clock cycle in all modes must be five times that of the data rate.



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