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W77C516 Datasheet Preview

W77C516 Datasheet

8-BIT Microcontroller

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Preliminary W77C516
8 BIT MICROCONTROLLER
GENERAL DESCRIPTION
The W77C516 is a fast 8051 compatible microcontroller with a redesigned processor core without
wasted clock and memory cycles. As a result, it executes every 8051 instruction faster than the
original 8051 for the same crystal speed. Typically, the instruction executing time of W77C516 is 1.5
to 3 times faster then that of traditional 8051, depending on the type of instruction. In general, the
overall performance is about 2.5 times better than the original for the same crystal speed. Giving the
same throughput with lower clock speed, power consumption has been improved. Consequently, the
W77C516 is a fully static CMOS design; it can also be operated at a lower crystal clock. The
W77C516 provides operating voltage from 4.5V to 5.5V. All W77C516 types also support on-chip
1KB SRAM without external memory component and glue logic, saving more I/O pins for users
application usage if they use on-chip SRAM instead of external SRAM.
FEATURES
8-bit CMOS microcontroller
High speed architecture of 4 clocks/machine cycle runs up to 40 MHz
Pin compatible with standard 80C52
Instruction-set compatible with MCS-51
64KB on-chip Mask-ROM
Four 8-bit I/O Ports
One extra 4-bit I/O port and Wait State control signal (available on 44-pin PLCC/QFP package)
Three 16-bit Timers
12 interrupt sources with two levels of priority
On-chip oscillator and clock circuitry
Two enhanced full duplex serial ports
256 bytes scratch-pad RAM
1KB on-chip SRAM for MOVX instruction
Programmable Watchdog Timer
Dual 16-bit Data Pointers
Software programmable access cycle to external RAM/peripherals
Packages:
DIP 40: W77C516-25/40
PLCC 44: W77C516P-25/40
QFP 44: W77C516F-25/40
Publication Release Date: September 1999
- 1 - Revision A1




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W77C516 Datasheet Preview

W77C516 Datasheet

8-BIT Microcontroller

No Preview Available !

Preliminary W77C516
PIN CONFIGURATIONS
40-Pin DIP (W77C516)
T2, P1.0
T2EX, P1.1
RXD1, P1.2
TXD1, P1.3
INT2, P1.4
INT3, P1.5
INT4, P1.6
INT5, P1.7
RST
RXD, P3.0
TXD, P3.1
INT0, P3.2
INT1, P3.3
T0, P3.4
T1, P3.5
WR, P3.6
RD, P3.7
XTAL2
XTAL1
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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
31 EA
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
44-Pin PLCC (W77C516P)
I TR
NXX
T DD
2 11
, ,,
PPP
111
...
432
T
2
ET
X2
,,
PP
11
..
10
P
4V
.D
2D
AAAA
DDDD
0123
,,,,
PPPP
0000
....
0123
INT3, P1.5
INT4, P1.6
INT5, P1.7
RST
RXD, P3.0
P4.3
TXD, P3.1
INT0, P3.2
INT1, P3.3
T0, P3.4
T1, P3.5
6 5 4 3 2 1 44 43 42 41 40
7 39
8 38
9 37
10 36
11 35
12 34
13 33
14 32
15 31
16 30
17 29
18 19 20 21 22 23 24 25 26 27 28
PP XXVPPPP PP
33 TTS4 22 2 2 2
. . AAS. . . . . .
67 LL 0012 34
, , 21 , , , , , ,
/ / / AAA AA
WR
W8 9 1 1 1
RD
A 012
I
T
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA
P4.1
ALE
PSEN
P2.7, A15
P2.6, A14
P2.5, A13
44-Pin QFP (W77C516F)
I TR
NX X
TD D
21 1
,,,
PPP
111
...
432
T
2
ET
X2
,,
PP
11
..
10
P
4V
.D
2D
AA A
DD D
01 2
,, ,
PP P
00 0
.. .
01 2
A
D
3
,
P
0
.
3
INT3, P1.5
INT4, P1.6
INT5, P1.7
RST
RXD, P3.0
P4.3
TXD, P3.1
INT0, P3.2
INT1, P3.3
T0, P3.4
T1, P3.5
44 43 42 41 40 39 38 37 36 35 34
1 33
2 32
3 31
4 30
5 29
6 28
7 27
8 26
9 25
10 24
11 23
12 13 14 15 16 17 18 19 20 21 22
PP X X VP PP P P P
3 3 T T S4 2 2 2 2 2
. . A A S. . . . . .
67 LL 0 012 3 4
, , 21 , , , , , ,
/ / / AAA A A
WR
W8 9 1 1 1
RD
A 012
I
T
P0.4, AD4
P0.5, AD5
P0.6, AD6
P0.7, AD7
EA
P4.1
ALE
PSEN
P2.7, A15
P2.6, A14
P2.5, A13
-2-


Part Number W77C516
Description 8-BIT Microcontroller
Maker Winbond
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W77C516 Datasheet PDF






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