
6
AT85C51SND3Bx
7632A–MP3–03/06
Pin Description
Pinouts
Figure 4. AT85C51SND3Bx 100-pin QFP Package
Notes: 1. Leave these pins unconnected for AT85C51SND3B1 & AT85C51SND3B2 products
2. Leave these pins unconnected for AT85C51SND3B1 product
NFD5
NFD6
NFD7
P0.1/SD1/LD1
P0.0/SD0/LD0
P0.2/SD2/LD2
P3.1/TXD/MOSI
P3.2/INT0
/RTS/SCK
P3.3/INT1
/CTS/SS
P3.4/T0
NFD3
NFD4
P5.3/SWR
/LWR/LRW
P5.2/SA0/LA0/LRS
AT85C51SND3Bx
MICIN
LINR
LINL
AVCM
MICBIAS
1
2
3
4
5
6
7
8
13
11
10
P1.4
CVSS
P3.6/UVCON
P3.7/UID
ULVDD
DMF
AVSS1
9
12
14
15
16
APVDD
X2
X1
APVSS
AVSS2
AVDD2
OUTL
(2)
OUTR
(2)
AREF
AVDD1
P1.1/KIN1
P1.0/KIN0
BVDD
DCPWR
(1)
BVSS
DCLI
(1)
RLVDD
VSS
UVCC
HVDD
LVDD
(1)
17
18
19
20
26
27
28
33
31
30
29
32
34
35
36
37
38
39
40
53
51
52
54
55
56
57
58
59
60
81
82
83
84
85
86
87
88
93
91
90
89
92
94
95
96
97
98
99
100
P1.3/KIN3
P1.2/KIN2
DPF
UVSS
UPVSS
UPVDD
OCDR
OCDT/ISP
UHVDD
DPH
DMH
UVSS
UBIAS
21
22
23
24
25
41
42
43
48
46
45
44
47
49
50
63
61
62
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
P4.1/DCLK
P4.2/DDAT
P4.3/DSEL
RST
P4.0/OCLK
NFD2
P5.1/SCS
/LCS
P5.0/SRD/LRD/LDE
P0.3/SD3/LD3
P0.4/SD4/LD4
P0.5/SD5/LD5
P0.6/SD6/LD6
P0.7/SD7/LD7
IOVSS
IOVDD
P3.0/RXD/MISO
P1.6
P1.7
P2.0/SDINS
P2.1/SDLCK
P2.2/SDCMD
P2.3/SDCLK
P2.4/SDDAT0
IOVDD
NFWP
P1.5
P2.5/SDDAT1
P2.6/SDDAT2
P2.7/SDDAT3
IOVSS
NFCE0
P4.4/NFCE1/SMLCK
NFWE
NFALE
NFCLE
P4.6/NFCE3
/SMCE
P4.5/NFCE2/SMINS
NFD1
NFD0
NFRE
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