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83C749 Datasheet(PDF) 17 Page - NXP Semiconductors

Part # 83C749
Description  80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

83C749 Datasheet(HTML) 17 Page - NXP Semiconductors

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Philips Semiconductors
Preliminary specification
83C749/87C749
80C51 8-bit microcontroller family
2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count
1998 Apr 23
17
A0–A10
ADDRESS STROBE
PROGRAMMING
PULSES
VPP/VIH VOLTAGE
SOURCE
CLK SOURCE
RESET
CONTROL
LOGIC
87C749
P3.0–P3.7
P0.0/ASEL
P0.1
P0.2
XTAL1
RESET
VCC
VSS
P1.0–P1.7
+5V
DATA BUS
SU00309
Figure 7. Programming Configuration
MIN 2 MACHINE
CYCLES
TEN BIT SERIAL CODE
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
UNDEFINED
UNDEFINED
XTAL1
RESET
P0.2
P0.1
SU00302
Figure 8. Entry into Program/Verify Modes
5V
12.75V
5V
25 PULSES
tSHGL
tGHSL
tGLGH
tGHGL
98
µs MIN
10
µs MIN
tMASEL
tHASET
tHAHLD
tADSTA
tDVGL
tGHDX
tAVQV
VERIFY MODE
PROGRAM MODE
VERIFY MODE
P0.2 (VPP)
P0.1 (PGM)
P0.0 (ASEL)
PORT 3
PORT 1
INVALID DATA
VALID DATA
DATA TO BE PROGRAMMED
INVALID DATA
VALID DATA
HIGH ADDRESS
LOW ADDRESS
SU00310
Figure 9. Program/Verify Cycle


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