參數(shù)資料
型號(hào)： MCP23S18T-E/MJ
廠商： Microchip Technology
文件頁(yè)數(shù)： 7/56頁(yè)
文件大小： 0K
描述： IC I/O EXPANDER SPI 16B 24QFN
標(biāo)準(zhǔn)包裝： 3,300
接口： SPI
輸入/輸出數(shù)： 16
中斷輸出： 是
頻率 - 時(shí)鐘： 10MHz
電源電壓： 1.8 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 24-VFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 24-QFN（4x4）
包裝： 帶卷 (TR)
2008 Microchip Technology Inc.
DS22103A-page 15
MCP23018/MCP23S18
1.5
GPIO Port
The GPIO module is a general purpose 16-bit wide
bidirectional port which is functionally split into two (2)
8-bit wide ports.
The outputs are open-drain.
The GPIO module contains the data ports (GPIOn),
internal pull up resistors and the Output Latches
(OLATn).
The pull up resistors are individually configured and
can be enabled when the pin is cofigured as an input or
output.
Reading the GPIOn register reads the value on the
port. Reading the OLATn register only reads the
latches, not the actual value on the port.
Writing to the GPIOn register actually causes a write to
the latches (OLATn). Writing to the OLATn register
forces the associated output drivers to drive to the level
in OLATn. Pins configured as inputs turn off the associ-
ated output driver and put it in high-impedance.
TABLE 1-2:
SUMMARY OF REGISTERS ASSOCIATED WITH THE GPIO PORTS (BANK = 1)
TABLE 1-3:
SUMMARY OF REGISTERS ASSOCIATED WITH THE GPIO PORTS (BANK = 0)
Register
Name
Address
(hex)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
POR/RST
value
IODIRA
00
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
1111 1111
IPOLA
01
IP7
IP6
IP5
IP4
IP3
IP2
IP1
IP0
0000 0000
GPINTENA
02
GPINT7
GPINT6
GPINT5
GPINT4
GPINT3
GPINT2
GPINT1
GPINT0
0000 0000
GPPUA
06
PU7
PU6
PU5
PU4
PU3
PU2
PU1
PU0
0000 0000
GPIOA
09
GP7
GP6
GP5
GP4
GP3
GP2
GP1
GP0
0000 0000
OLATA
0A
OL7
OL6
OL5
OL4
OL3
OL2
OL1
OL0
0000 0000
IODIRB
10
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
1111 1111
IPOLB
11
IP7
IP6
IP5
IP4
IP3
IP2
IP1
IP0
0000 0000
GPINTENB
12
GPINT7
GPINT6
GPINT5
GPINT4
GPINT3
GPINT2
GPINT1
GPINT0
0000 0000
GPPUB
16
PU7
PU6
PU5
PU4
PU3
PU2
PU1
PU0
0000 0000
GPIOB
19
GP7
GP6
GP5
GP4
GP3
GP2
GP1
GP0
0000 0000
OLATB
1A
OL7
OL6
OL5
OL4
OL3
OL2
OL1
OL0
0000 0000
Register
Name
Address
(hex)
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
POR/RST
value
IODIRA
00
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
1111 1111
IODIRB
01
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
1111 1111
IPOLA
02
IP7
IP6
IP5
IP4
IP3
IP2
IP1
IP0
0000 0000
IPOLB
03
IP7
IP6
IP5
IP4
IP3
IP2
IP1
IP0
0000 0000
GPINTENA
04
GPINT7
GPINT6
GPINT5
GPINT4
GPINT3
GPINT2
GPINT1
GPINT0
0000 0000
GPINTENB
05
GPINT7
GPINT6
GPINT5
GPINT4
GPINT3
GPINT2
GPINT1
GPINT0
0000 0000
GPPUA
0C
PU7
PU6
PU5
PU4
PU3
PU2
PU1
PU0
0000 0000
GPPUB
0D
PU7
PU6
PU5
PU4
PU3
PU2
PU1
PU0
0000 0000
GPIOA
12
GP7
GP6
GP5
GP4
GP3
GP2
GP1
GP0
0000 0000
GPIOB
13
GP7
GP6
GP5
GP4
GP3
GP2
GP1
GP0
0000 0000
OLATA
14
OL7
OL6
OL5
OL4
OL3
OL2
OL1
OL0
0000 0000
OLATB
15
OL7
OL6
OL5
OL4
OL3
OL2
OL1
OL0
0000 0000
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