p89c668hbbd NXP Semiconductors, p89c668hbbd Datasheet - Page 44
p89c668hbbd
Manufacturer Part Number
p89c668hbbd
Description
80c51 8-bit Flash Microcontroller Family
Manufacturer
NXP Semiconductors
Datasheet
1.P89C668HBBD.pdf
(89 pages)
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P89C668HBBD
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TI
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P89C668HBBD
Manufacturer:
PHILPS
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p89c668hbbd/00,557
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NXP Semiconductors
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Philips Semiconductors
2002 Oct 28
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM
Data
Shift
TxD
TI
RxD
Shift
Bit Detector
Sample Times
RI
SMOD = 0
Clock
Clock
RX
TX
Overflow
Write to SBUF
Timer 1
2
SMOD = 1
16 Reset
Start Bit
Send
RxD
Start
Bit
S1P1
SBUF
Write
Interrupt
D0
D0
Serial
to
Port
Transition
Detector
1-to-0
Sample
D1
D1
16
D2
D2
D
CL
TB8
Figure 29. Serial Port Mode 1
S
Bit Detector
Q
TX Clock
Start
Read
SBUF
Start
D3
D3
16
Load
SBUF
RX Clock RI
Zero Detector
D4
D4
44
TX Control
RX Control
80C51 Internal Bus
80C51 Internal Bus
T1
SBUF
Input Shift Register
D5
D5
SBUF
Shift
(9 Bits)
1FFH
P89C660/P89C662/P89C664/
D6
D6
Load
SBUF
Data
Send
Shift
Shift
D7
D7
Stop Bit
Stop Bit
P89C668
Product data
TxD
Transmit
Receive
SU00540
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