Datasheet

MCP23017/MCP23S17
DS20001952C-page 8  2005-2016 Microchip Technology Inc.
FIGURE 1-5: SPI INPUT TIMING
FIGURE 1-6: SPI OUTPUT TIMING
TABLE 1-4: SPI INTERFACE REQUIREMENTS
SPI Interface AC Characteristics: Unless otherwise noted, 1.8V V
DD
 5.5V at -40C  T
A
 +125C
Param.
No.
Characteristic Sym. Min. Typ. Max. Units Conditions
— Clock Frequency F
CLK
— — 5 MHz 1.8V – 5.5V
— — 10 MHz 2.7V – 5.5V
— — 10 MHz 4.5V – 5.5V
1CS
Setup Time T
CSS
50 — — ns
2CS
Hold Time T
CSH
100 — — ns 1.8V – 5.5V
50 — — ns 2.7V – 5.5V
3CS
Disable Time T
CSD
100 — — ns 1.8V – 5.5V
50 — — ns 2.7V – 5.5V
4 Data Setup Time T
SU
20 — — ns 1.8V – 5.5V
10 — — ns 2.7V – 5.5V
Note 1: This parameter is characterized, not 100% tested.
SCK
SI
SO
1
5
4
7
6
3
10
2
LSB in
MSB in
High-Impedance
11
Mode 1,1
Mode 0,0
Note 1: When using SPI Mode 1,1 the CS pin needs to be toggled once before the first communication after
power-up.
CS
(1)
CS
SCK
SO
8
13
MSB out
LSB out
2
14
Don’t Care
SI
Mode 1,1
Mode 0,0
9
12