AS8268 データシートの表示（PDF） - austriamicrosystems AG

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AS8268

Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os, LCD Driver and On-Chip FLASH Memory

austriamicrosystems AG 

Data Sheet AS8267 / AS8268

Pin Pin Name Pin Name Type Description

No. AS8267 AS8268

11

IO2

12

IO3

IO2

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

IO3

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

13 VDDD

VDDD

S Positive supply voltage to the digital circuitry and is internally connected to pin

22. The required supply voltage is 3.3V ±10%.

14 VSSD

VSSD

S Ground reference for the digital circuitry.

15

IO4

IO4

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

16

IO5

17

IO6

IO5

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

IO6

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

18

IO7

19

IO8

IO7

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

IO8

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

20 MISO

21 VSSD

MISO

VSSD

DIOPD Serial peripheral interface (SPI):

Serial Data input in Master mode

Serial Data output in Slave mode

S Ground reference for the digital circuitry.

22 VDDD

VDDD

S Positive digital supply. VDDD provides the positive supply voltage to the digital

circuitry and is internally connected to pin 13. The required supply voltage is

3.3V ±10%.

23

S_N

S_N DIOPU Serial peripheral interface (SPI): Chip select

24 MOSI

25

SC

MOSI

SC

DIOPD Serial peripheral interface (SPI):

Serial Data output in Master mode

Serial Data input in Slave mode

DIOPU Serial peripheral interface (SPI): Serial clock

26

n.c.

27

n.c.

IO9

IO10

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

28

n.c.

29

TXD

IO11

TXD

DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down

resistors and selectable drive strength.

DO Universal Asynchronous Receiver/Transmitter (UART1) serial transmit data

output.

30

RXD

RXD

DIPU Universal Asynchronous Receiver/Transmitter (UART1) serial receive data

input.

31 VDD_BAT VDD_BAT S Battery backup supply voltage input for the real time clock (RTC).

32

XIN

33 XOUT

XIN

XOUT

AI A 3.0 to 4.0MHz crystal may be connected across XIN and XOUT.

Alternatively, an external clock signal may be applied to XIN.

AO See XIN above, for the connection of a crystal. When an external clock is

applied to XIN, XOUT is not connected.

34 RES_N RES_N

System reset active low.

35

n.c.

n.c.

Not connected

Revision 1.0, 19-Jun-07

Page 5 of 136

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