MCP23017 查看數據表（PDF） - Microchip Technology

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MCP23017

16-Bit I/O Expander with Serial Interface

Microchip Technology 

MCP23017/MCP23S17

FIGURE 1-5:

SPI INPUT TIMING

CS (1)

1

6

Mode 1,1

SCK Mode 0,0

4

5

SI

MSB in

7

2

3

11

10

LSB in

SO

High-Impedance

Note 1: When using SPI Mode 1,1 the CS pin needs to be toggled once before the first communication after

power-up.

FIGURE 1-6:

SPI OUTPUT TIMING

CS

SCK

SO

SI

8

9

12

MSB out

13

Don’t Care

2

Mode 1,1

Mode 0,0

14

LSB out

TABLE 1-4: SPI INTERFACE REQUIREMENTS

SPI Interface AC Characteristics: Unless otherwise noted, 1.8V VDD  5.5V at -40C  TA  +125C

Param.

No.

Characteristic

Sym. Min. Typ. Max. Units

Conditions

— Clock Frequency

FCLK

—

—

—

—

—

—

1 CS Setup Time

2 CS Hold Time

TCSS

50

—

TCSH

100

—

50 —

3 CS Disable Time

TCSD

100

—

50 —

4 Data Setup Time

TSU

20 —

10 —

Note 1: This parameter is characterized, not 100% tested.

5 MHz 1.8V – 5.5V

10 MHz 2.7V – 5.5V

10 MHz 4.5V – 5.5V

—

ns

—

ns 1.8V – 5.5V

—

ns 2.7V – 5.5V

—

ns 1.8V – 5.5V

—

ns 2.7V – 5.5V

—

ns 1.8V – 5.5V

—

ns 2.7V – 5.5V

DS20001952C-page 8

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