Cypress Semiconductor Perform CY8C21x23 Manuel d'utilisateur Page 9

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February 25, 2005 Document No. 38-12022 Rev. *G 9
CY8C21x23 Final Data Sheet 1. Pin Information
1.1.3 20-Pin Part Pinout
Table 1-3. 20-Pin Part Pinout (SSOP)
Pin
No.
Type
Name Description
CY8C21323 20-Pin PSoC Device
Digital Analog
1 IO I P0[7] Analog column mux input.
2 IO I P0[5] Analog column mux input.
3 IO I P0[3] Analog column mux input.
4 IO I P0[1] Analog column mux input.
5 Power Vss Ground connection.
6 IO P1[7] I2C Serial Clock (SCL).
7 IO P1[5] I2C Serial Data (SDA).
8 IO P1[3]
9 IO P1[1] I2C Serial Clock (SCL), ISSP-SCLK.
10 Power Vss Ground connection.
11 IO P1[0] I2C Serial Data (SDA), ISSP-SDATA.
12 IO P1[2]
13 IO P1[4] Optional External Clock Input (EXT-
CLK).
14 IO P1[6]
15 Input XRES Active high external reset with internal
pull down.
16 IO I P0[0] Analog column mux input.
17 IO I P0[2] Analog column mux input.
18 IO I P0[4] Analog column mux input.
19 IO I P0[6] Analog column mux input.
20 Power Vdd Supply voltage.
LEGEND A = Analog, I = Input, and O = Output.
SSOP
Vdd
P0[6], A, I
P0[4], A, I
P0[2], A, I
P0[0], A, I
XRES
P1[6]
P1[4], EXTCLK
P1[2]
P1[0], I2C SDA
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
A, I, P0[7]
A, I, P0[5]
A, I, P0[3]
A, I, P0[1]
I2C SCL, P1[7]
I2C SDA, P1[5]
P1[3]
I2C SCL, P1[1]
Vss
Vss
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