June 4, 2004
Document No. 38-12011 Rev. *F
10
CY8C24x23 Final Data Sheet
1. Pin Information
1.1.3
28-Pin Part Pinout
Table 1-3. 28-Pin Part Pinout (PDIP, SSOP, SOIC)
Pin
No.
Type
Pin
Name
Description
CY8C24423 28-Pin PSoC Device
Digital
Analog
1
IO
I
P0[7]
Analog column mux input.
2
IO
IO
P0[5]
Analog column mux input and column output.
3
IO
IO
P0[3]
Analog column mux input and column output.
4
IO
I
P0[1]
Analog column mux input.
5
IO
P2[7]
6
IO
P2[5]
7
IO
I
P2[3]
Direct switched capacitor block input.
8
IO
I
P2[1]
Direct switched capacitor block input.
9
Power
SMP
Switch Mode Pump (SMP) connection to
external components required.
10
IO
P1[7]
I2C Serial Clock (SCL)
11
IO
P1[5]
I2C Serial Data (SDA)
12
IO
P1[3]
13
IO
P1[1]
Crystal Input (XTALin), I2C Serial Clock (SCL)
14
Power
Vss
Ground connection.
15
IO
P1[0]
Crystal Output (XTALout), I2C Serial Data
(SDA)
16
IO
P1[2]
17
IO
P1[4]
Optional External Clock Input (EXTCLK)
18
IO
P1[6]
19
Input
XRES
Active high external reset with internal pull
down.
20
IO
I
P2[0]
Direct switched capacitor block input.
21
IO
I
P2[2]
Direct switched capacitor block input.
22
IO
P2[4]
External Analog Ground (AGND)
23
IO
P2[6]
External Voltage Reference (VRef)
24
IO
I
P0[0]
Analog column mux input.
25
IO
I
P0[2]
Analog column mux input.
26
IO
I
P0[4]
Analog column mux input.
27
IO
I
P0[6]
Analog column mux input.
28
Power
Vdd
Supply voltage.
LEGEND: A = Analog, I = Input, and O = Output.
AI, P0[7]
AIO, P0[5]
AIO, P0[3]
AI, P0[1]
P2[7]
P2[5]
AI, P2[3]
AI, P2[1]
SMP
I2C SCL, P1[7]
I2C SDA, P1[5]
P1[3]
I2C SCL, XTALin, P1[1]
Vss
Vdd
P0[6], AI
P0[4], AI
P0[2], AI
P0[0], AI
P2[6], External VRef
P2[4], External AGND
P2[2], AI
P2[0], AI
XRES
P1[6]
P1[4], EXTCLK
P1[2]
P1[0], XTALout, I2C SDA
PDIP
SSOP
SOIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15