UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Table 1. uPSD325X Devices Product Matrix
Part
No.
Main
Flash
(bit)
Sec.
Flash
(bit)
SRAM
(bit)
Macro
-Cells
I/O
Pins
PWM
Ch.
Timer
/ Ctr
UART
Ch.
I2C
ADC
Ch.
DDC
USB
VCC
MHz
Pins
uPSD
3254 2M 256K 256K
A-40
16
37 or
46
5
3
2
1
4
yes
yes
5V
40
52 or
80
uPSD
3254 2M 256K 256K 16 46 5
3
2 1 4 yes
BV-24
3V 24 80
uPSD
3253 1M 256K 256K 16 37 5
3
2 1 4 yes
B-40
5V 40 52
uPSD
3253 1M 256K 256K 16 37 5
3
2 1 4 yes
BV-24
3V 24 52
Figure 3. TQFP52 Connections
PD1 1
PC7 2
PC6 3
PC5 4
USB– 5(1)
PC4 6
USB+ 7(2)
VCC 8
GND 9
PC3 10
PC2 11
PC1 12
PC0 13
39 P1.5 / ADC1
38 P1.4 / ADC0
37 P1.3 / TXD1
36 P1.2 / RXD1
35 P1.1 / T2X
34 P1.0 / T2
33 VCC
32 XTAL2
31 XTAL1
30 P3.7 / SCL2
29 P3.6 / SDA2
28 P3.5 / T1
27 P3.4 / T0
AI05790C
Note: 1. Pull-up resistor required on pin 5 (2kΩ for 3V devices, 7.5kΩ for 5V devices) for all 52-pin devices, with or without USB function.
2. Pin 7 is Not Connected (NC) for device with no USB function.
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