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부품번호 P80C851IBA 기능
기능 CMOS single-chip 8-bit microcontroller with on-chip EEPROM
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P80C851IBA 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
80C851/83C851
CMOS single-chip 8-bit microcontroller
with on-chip EEPROM
Product specification
Supersedes data of 1992 Nov 25
IC20 Data Handbook
1998 Jul 03
Philips
Semiconductors




P80C851IBA pdf, 반도체, 판매, 대치품
Philips Semiconductors
CMOS single-chip 8-bit microcontroller
with on-chip EEPROM
Product specification
80C851/83C851
PIN CONFIGURATIONS
P1.0 1
P1.1 2
P1.2 3
P1.3 4
P1.4 5
P1.5 6
P1.6 7
P1.7 8
RST 9
RxD/P3.0 10
TxD/P3.1 11
INT0/P3.2 12
INT1/P3.3 13
T0/P3.4 14
T1/P3.5 15
WR/P3.6 16
RD/P3.7 17
XTAL2 18
XTAL1 19
VSS 20
40 VDD
39 P0.0/AD0
38 P0.1/AD1
37 P0.2/AD2
36 P0.3/AD3
35 P0.4/AD4
34 P0.5/AD5
33 P0.6/AD6
32 P0.7/AD7
DUAL 31 EA
IN-LINE
PACKAGE 30 ALE
29 PSEN
28 P2.7/A15
27 P2.6/A14
26 P2.5/A13
25 P2.4/A12
24 P2.3/A11
23 P2.2/A10
22 P2.1/A9
21 P2.0/A8
6 1 40
7 39
PLASTIC
LEADED
CHIP
CARRIER
17 29
18 28
44 34
1 33
PLASTIC
QUAD
FLAT
PACK
11 23
12 22
PLASTIC LEADED CHIP
CARRIER PIN FUNCTIONS
6 1 40
7 39
PLCC
17 29
18 28
Pin Function
1 NC*
2 P1.0
3 P1.1
4 P1.2
5 P1.3
6 P1.4
7 P1.5
8 P1.6
9 P1.7
10 RST
11 P3.0/RxD
12 NC*
13 P3.1/TxD
14 P3.2/INT0
15 P3.3/INT1
16 P3.4/T0
17 P3.5/T1
18 P3.6/WR
19 P3.7/RD
20 XTAL2
21 XTAL1
22 VSS
Pin
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
* NO INTERNAL CONNECTION
Function
NC*
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
PSEN
ALE
NC*
EA
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
PLASTIC QUAD FLAT PACK
PIN FUNCTIONS
44 34
1 33
PQFP
11 23
12 22
Pin Function
1 P1.5
2 P1.6
3 P1.7
4 RST
5 P3.0/RxD
6 NC*
7 P3.1/TxD
8 P3.2/INT0
9 P3.3/INT1
10 P3.4/T0
11 P3.5/T1
12 P3.6/WR
13 P3.7RD
14 XTAL2
15 XTAL1
16 VSS
17 NC*
18 P2.0/A8
19 P2.1/A9
20 P2.2/A10
21 P2.3/A11
22 P2.4/A12
Pin
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
* NO INTERNAL CONNECTION
Function
P2.5/A13
P2.6/A14
P2.7/A15
PSEN
ALE
NC*
EA
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
VSS
P1.0
P1.1
P1.2
P1.3
P1.4
1998 Jul 03
4

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P80C851IBA 전자부품, 판매, 대치품
Philips Semiconductors
CMOS single-chip 8-bit microcontroller
with on-chip EEPROM
Product specification
80C851/83C851
EEPROM
Communications between the CPU and the
EEPROM is accomplished via 5 special
function registers; 2 address registers (high
and low byte), 1 data register for read and
write operations, 1 control register, and 1
timer register to adapt the erase/write time to
the clock frequency. All registers can be read
and written. Figure 1 shows a block diagram
of the CPU, the EEPROM and the interface.
Register and Functional
Description
EADRH register address is F3H. The EADRL
register address is F2H.
Data Register (EDAT)
This register is required for read and write
operations and also for row/block erase. In
write mode, its contents are written to the
addressed byte (for “row erase” and “block
erase” the contents are don’t care). The write
pulse starts all operations, except read. In
read mode, EDAT contains the data of the
addressed byte. The EDAT register address
is F4H.
Address Register (EADRH, EADRL)
The lower byte contains the address of one
of the 256 bytes. The higher byte (EADRH) is
for future extensions and for addressing the
security bits (see Security Facilities). The
Timer Register (ETIM)
The timer register is required to adapt the
erase/write time to the oscillator frequency.
The user has to ensure that the erase or
write (program) time is neither too short or
too long.
Table 2. Values for the Timer Register (ETIM)
fXTAL1
VALUES FOR ETIM
2ms WRITE TIME
10ms WRITE TIME
HEX
DEC
HEX
DEC
1.0MHz
2.0MHz
02
– 08
2 13
8
19
3.0MHz
04
4 1D
4.0MHz
06
6 28
5.0MHz
08
8 32
6.0MHz
0A
10
3C
29
40
50
60
7.0MHz
0C
12
47
71
8.0MHz
0E
14
51
81
9.0MHz
10
16
5C
92
10.0MHz
12
18
66
102
11.0MHz
14
20
71
113
12.0MHz
16
22
7B
123
13.0MHz
18
24
14.0MHz
1A
26
15.0MHz
1C
28
16.0MHz
1E
30
.
.
24.0MHz
2C
4745
The ETIM register address is F5H. Table 2
contains the values which must be written to
the ETIM register by software for various
oscillator frequencies (the default value is
08H after RESET).
The general formula is:
2ms Write time:
Value (decimal,
to be rounded up)
+
fXTAL1 [kHz]
512
*2
10ms Write time:
Value (decimal)
+
fXTAL1 [kHz]
96
*2
Control Register (ECNTRL)
See Figure 2 for a description of this register.
The ECNTRL register address is F6H.
CPU
INTERRUPT
POWER-DOWN IDLE
RESET
CLK
SEQUENCER
8
ECNTRL
CLOCK
GENERATOR
ETIM
CONTROL
LOGIC
EEPROM
MATRIX
COLUMN
DECODER
3
5 ROW
DECODER
8
EDATA
3
EADRH
8
EADRL
1998 Jul 03
INTERNAL BUS
Figure 1. EEPROM Interface Block Diagram
7

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