AT89C51SND1C-ROTIL ATMEL Corporation, AT89C51SND1C-ROTIL Datasheet - Page 4

• Manufacturer Part Number: AT89C51SND1C-ROTIL
• Description: Single-Chip Microcontroller with MP3 Decoder and Man-Machine Interface
• Manufacturer: ATMEL Corporation

Pin Descriptions
4
AT8xC51SND1C
Figure 2. AT8xC51SND1C 84-pin PLCC Package
Note:
All AT8xC51SND1C signals are detailed by functionality in Table 1 through Table 14.
Table 1. Ports Signal Description
Signal
Name
P1.0/KIN0
P1.1/KIN1
P1.2/KIN2
P1.3/KIN3
P0.7:0
P1.7:0
P1.7/SDA
P1.6/SCL
PA
PAVSS
U
UVSS
TST
V
V
V
P1.4
P1.5
VSS
FILT
ALE
ISP
NC
DD
DD
X2
X1
DD
1. Only samples for development board.
Type
I/O
I/O
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Description
Port 0
P0 is an 8-bit open-drain bi-directional I/O port. Port 0 pins that have 1s
written to them float and can be used as high impedance inputs. To
avoid any parasitic current consumption, floating P0 inputs must be
polarized to
Port 1
P1 is an 8-bit bi-directional I/O port with internal pull-ups.
V
AT89C51SND1C-SR (Flash)
DD
or V
SS
.
(1)
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
4106F–8051–10/02
NC
P4.5
P4.4
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
VSS
V
MCLK
MDAT
MCMD
RST
SCLK
DSEL
DCLK
DOUT
VSS
V
DD
DD
Alternate
Function
KIN3:0
AD7:0
SDA
SCL