CY8C21634, CY8C21534
CY8C21434, CY8C21334, CY8C21234
Document Number: 38-12025 Rev. *O Page 9 of 45
20-Pin Part Pinout
Figure 4. CY8C21334 20-Pin PSoC Device
SSOP
Vdd
P0[6], A, I, M
P0[4], A, I, M
P0[2], A, I, M
P0[0], A, I, M
XRES
P1[6], M
P1[4], EXTCLK, M
P1[2], M
P1[0], I2C SDA, M
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
A, I, M, P0[7]
A, I, M, P0[5]
A, I, M, P0[3]
A, I, M, P0[1]
M, I2C SCL, P1[7]
SDA, P1[5]
M, P1[3 ]
SCL, P1[1]
Vss
Vss
M, I2C
M, I2C
Table 4. Pin Definitions - CY8C21334 20-Pin (SSOP)
Pin No. Type Name Description
Digital Analog
1IO I, M P0[7] Analog column mux input.
2IO I, M P0[5] Analog column mux input.
3IO I, M P0[3] Analog column mux input, integrating input.
4IO I, M P0[1] Analog column mux input, integrating input.
5Power Vss Ground connection.
6IO MP1[7] I2C Serial Clock (SCL).
7IO MP1[5] I2C Serial Data (SDA).
8IO MP1[3]
9IO MP1[1] I2C Serial Clock (SCL), ISSP-SCLK[3].
10 Power Vss Ground connection.
11 IO MP1[0] I2C Serial Data (SDA), ISSP-SDATA[3].
12 IO MP1[2]
13 IO MP1[4] Optional External Clock Input (EXTCLK).
14 IO MP1[6]
15 Input XRES Active high external reset with internal pull down.
16 IO I, M P0[0] Analog column mux input.
17 IO I, M P0[2] Analog column mux input.
18 IO I, M P0[4] Analog column mux input.
19 IO I, M P0[6] Analog column mux input.
20 Power Vdd Supply voltage.
LEGEND A = Analog, I = Input, O = Output, and M = Analog Mux Input.
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