USB97C201-MN SMSC [SMSC Corporation], USB97C201-MN Datasheet - Page 24

• Manufacturer Part Number: USB97C201-MN
• Description: USB 2.0 ATA/ ATAPI Controller
• Manufacturer: SMSC [SMSC Corporation]

Note 1: Writing a “1” (one) to a bit clears the bit and enables the detection of the next level transition. If not masked
SMSC DS – USB97C201
by the corresponding bit in the GPIO_MSK register, “1” in any bit in this register will force a “1” on the 8051
core’s external INT4 interrupt input.
BIT
7
6
5
4
3
2
1
0
(0XC0- RESET=0x00)
BIT
7
6
5
4
3
2
1
0
BIT
GPIO7_IRQ
GPIO6_IRQ
GPIO5_IRQ
GPIO4_IRQ
GPIO3_IRQ
GPIO2_IRQ
GPIO1_IRQ
GPIO0_IRQ
7
6
5
4
3
2
1
0
GPIO_IRQ
NAME
(0x9A- RESET=0x00)
(0x9B- RESET=0x00)
GPIO4/nWE
GPIO0/RXD
GPIO1/TXD
Table 15 – GPIO Interrupt Status Register (INT4)
GPIO3/T1
GPIO2/T0
GPIO4/nWE
GPIO1/TXD
GPIO0/RXD
GPIO_OUT
NAME
GPIO7
GPIO6
GPIO5
GPIO3/T1
GPIO2/T0
GPIO7
GPIO6
GPIO5
NAME
GPIO_IN
Table 13 - GPIO Output Register
Table 14 - GPIO Input Register
PRELIMINARY
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1 = A level change has occurred on GPIO7.
1 = A level change has occurred on GPIO6.
1 = A level change has occurred on GPIO5.
1 = A level change has occurred on GPIO4.
1 = A level change has occurred on GPIO3.
1 = A level change has occurred on GPIO2.
1 = A level change has occurred on GPIO1.
1 = A level change has occurred on GPIO0.
R
R
R
R
R
R
R
R
Page 24
GPIO INTERRUPT STATUS REGISTER
GPIO7 Output Buffer Data
GPIO6 Output Buffer Data
GPIO5 Output Buffer Data
GPIO4 Output Buffer Data
GPIO3 Output Buffer Data
GPIO2 Output Buffer Data
GPIO1 Output Buffer Data
GPIO0 Output Buffer Data
GPIO7 Input Buffer Data
GPIO6 Input Buffer Data
GPIO5 Input Buffer Data
GPIO4 Input Buffer Data
GPIO3 Input Buffer Data
GPIO2 Input Buffer Data
GPIO1 Input Buffer Data
GPIO0 Input Buffer Data
GPIO INPUT REGISTER
GPIO DATA OUTPUT
DESCRIPTION
DESCRIPTION
DESCRIPTION
REGISTER
Rev. 03/25/2002