ST7590

Pin connection

Doc ID 18349 Rev 1

7/24

XOUT

32

13

Analog

Crystal oscillator output

XIN

31

12

Analog

Crystal oscillator input

N.C

30

-

Not connected

N.C

29

-

Not connected

VDD

28

11

Power

Digital power supply (1.8 V)

N.C

27

-

Not connected

RESETN

26

10

Digital input

System reset (active low)

TDI

25

9

Digital input (1) System/M851EW JTAG interface data in

TDO

24

8

Digital I/O

System/M851EW JTAG interface data out

TCK

23

7

Digital input

System/M851EW JTAG interface clock

GND

22

6

Power

Ground

VDDIO

21

-

Power

3.3 V - 5 V I/O supply

SRAM_A0

20

-

Digital output

External SRAM address

SRAM_A1

19

-

Digital output

External SRAM address

SRAM_A2

18

-

Digital output

External SRAM address

SRAM_A3

17

-

Digital output

External SRAM address

SRAM_A4

16

-

Digital output

External SRAM address

SRAM_A5

15

-

Digital output

External SRAM address

SRAM_A6

14

-

Digital output

External SRAM address

SRAM_A7

13

-

Digital output

External SRAM address

SRAM_A8

12

-

Digital output

External SRAM address

SRAM_A9

11

-

Digital output

External SRAM address

SRAM_A10

10

-

Digital output

External SRAM address

SRAM_A11

9

-

Digital output

External SRAM address

SRAM_A12

8

-

Digital output

External SRAM address

SRAM_A13

7

-

Digital output

External SRAM address

SRAM_A14

6

-

Digital output

External SRAM address

TMS

5

5

Digital input (1) System/M8051EW JTAG interface test mode selection

TRSTN

4

4

Digital input (1) System/M8051EW JTAG interface reset (active low)

VDDIO

3

3

Power

3.3 V - 5 V I/O supply

MISO0_RXD

2

2

Digital I/O

UART data in, SPI0 data out

MOSI0_TXD

1

1

Digital I/O

UART data out, SPI0 data in

1.

Active Pull up (only in input mode for bi-directional pins)

Table 1.

Pin description (continued)

Name

Pin

Type

Description

TQFP QFN