CY8C20X37 CYPRESS [Cypress Semiconductor], CY8C20X37 Datasheet - Page 7

• Manufacturer Part Number: CY8C20X37
• Manufacturer: CYPRESS [Cypress Semiconductor]

Pinouts
The CY8C20x37/47/67/S PSoC device is available in a variety of packages, which are listed and illustrated in the following tables.
Every port pin (labeled with a “P”) is capable of digital I/O and connection to the common analog bus. However, V
are not capable of digital I/O.
16-pin SOIC (12 Sensing Inputs)
Table 1. Pin Definitions – CY8C20237-24SXI, CY8C20247-24SXI
Document Number: 001-69257 Rev. *F
Notes
LEGEND A = Analog, I = Input, O = Output, OH = 5 mA High Output Drive, R = Regulated Output.
Pin
No.
4. On power-up, the SDA(P1[0]) drives a strong high for 256 sleep clock cycles and drives resistive low for the next 256 sleep clock cycles. The SCL(P1[1]) line drives
5. Alternate SPI clock.
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
resistive low for 512 sleep clock cycles and both the pins transition to high impedance state. On reset, after XRES de-asserts, the SDA and the SCL lines drive
resistive low for 8 sleep clock cycles and transition to high impedance state. Hence, during power-up or reset event, P1[1] and P1[0] may disturb the I2C bus. Use
alternate pins if you encounter issues.
Digital
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
INPUT
Power
Power
Type
Analog
I
I
I
I
I
I
I
I
I
I
I
I
I
Name
XRES Active high external reset with
P0[3] Integrating Input
P0[1] Integrating Input
P2[5]
P2[3]
P1[7]
P1[5]
P1[3]
P1[1] ISSP CLK
P1[0] ISSP DATA
P1[2] Driven Shield Output (optional)
P1[4] Optional external clock
P0[4]
P0[7]
V
V
DD
SS
MOSI
Ground connection
CLK
(EXTCLK)
internal pull-down
Supply voltage
[5]
Description
[4]
[4]
, I
, I
2
C SCL, SPI
2
C SDA, SPI
Figure 2. CY8C20237-24SXI, CY8C20247-24SXI Device
AI, ISSP CLK, I
2
C SCL, SPI MOSI, P1[1]
CY8C20x37/37S/47/47S/67/67S
AI, P0[3]
AI, P0[1]
AI, P2[5]
AI, P2[3]
AI, P1[7]
AI, P1[5]
AI, P1[3]
1
2
3
4
5
6
7
8
SOIC
16
15
14
13
12
11
10
9
P0[7], AI
V
P0[4], AI
XRES
P1[4], EXTCLK
P1[2], AI
P1[0], ISSP DATA, I
V
DD
SS
SS
, V
2
DD
C SDA, SPI CLK, AI
Page 7 of 39
, and XRES