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RS-A9/EW
119
5678
56
7
8
C
D
F
A
B
E
Serial
Interface
Engine
(SIE)
USB
Transceiver
D+
D-
bytes
bytes
IO Ports
General
Purpose
Microprocessor
USB
Interface
Program &
Data
RAM
40
38
37
36
35
34
33
32
31
30
29
28
27
26
25
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
SDA
GND
VCC
BKPT
D7
D6
D5
D4
GND
PB7/T2out
PB6/INT6
PB5/INT5
PB4/INT4
D3
D2
D1
D0
PB3/TxD1
PB2/RxD1
PB1/T2EX
PB0/T2
GND
VCC
PC7/RD#
PC0/RxD0
PC1/TxD0
PC2/INT0#
PC3/INT1#
PC4/T0
PC6/WR#
A8
A9
A15
A14
A13
A12
A11
A10
PC5/T1
RESET
SCL
WAKEUP#
GND
USBD+
PA0/T0out
PA1/T1out
PA2/OE#
PA3/CS#
PA4/FWR#
PA5/FRD#
PA6/RXD0out
PA7/RXD1out
NC
USBD-
PSEN#
GND
123456789
10
11
12 13 14
15
16 17
18
19 20 21 22
23
24
60 59 58 57 56 55 54 53 52 51 50 49 48
47
46 45 44 43 42 4164 63 62 61
39
GND
A6
A7
GND
AGND
XIN
XOUT
AVCC
VCC
GND
EA
DISCON#
VCC
GND
CLK24
GND
GND
A0
A1
A2
A3
A4
A5
GND
*AN2135S
*LT1358CS8
- Block diagram
1OUT A
-IN A
+IN A
V+
V+
OUT B
-IN B
+IN B
2
3
4
8
7
6
5
A
B