lm8328tmx National Semiconductor Corporation, lm8328tmx Datasheet - Page 34

• Manufacturer Part Number: lm8328tmx
• Description: Mobile I/o Companion Supporting Keyscan, I/o Expansion Pwm, And Access.bus Host Interface
• Manufacturer: National Semiconductor Corporation

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** written values of 0x2 and 0x3 will always be read back as 0x3
13.4.5 IOPC2 - Pull Resistor Configuration Register 2
*** written values of 0x2 and 0x3 will always be read back as 0x3
13.4.6 GPIOOME0 - GPIO Open Drain Mode Enable
Register 0
Register - Name
Register - Name
Register - Name
KPY11PR[1:0]
KPY10PR[1:0]
KPX[7:0]ODE
KPY2PR[1:0]
KPY1PR[1:0]
KPY0PR[1:0]
KPY9PR[1:0]
KPY8PR[1:0]
GPIOOME0
Bit - Name
Bit - Name
(reserved)
IOPC2***
Address
Address
Address
TABLE 56. GPIOOME0 - GPIO Open Drain Mode Enable Register 0
0xAE
0xE0
15:8
5:4
3:2
1:0
Bit
7:6
5:4
3:2
1:0
Bit
7:0
TABLE 55. IOPC2 - Pull Resistor Configuration Register 2
Default
Default
Type
Type
0x5A
Type
R/W
R/W
0x1
0x1
0x1
0x0
0x1
0x1
0x1
0x0
Resistor enable for KPY2 ball
00: no pull resistor at ball
01:pull down resistor programmed
1x: pull up resistor programmed
Resistor enable for KPY1 ball
00: no pull resistor at ball
01:pull down resistor programmed
1x: pull up resistor programmed
Resistor enable for KPY0 ball
00: no pull resistor at ball
01:pull down resistor programmed
1x: pull up resistor programmed
Register Function
Defines the pull resistor configuration for balls KPY[11:8]
(reserved)
Resistor enable for KPY11 ball
00: no pull resistor at ball
01:pull down resistor programmed
1x: pull up resistor programmed
Resistor enable for KPY10 ball
00: no pull resistor at ball
01:pull down resistor programmed
1x: pull up resistor programmed
Resistor enable for KPY9 ball
00: no pull resistor at ball
01:pull down resistor programmed
1x: pull up resistor programmed
Resistor enable for KPY8 ball
00: no pull resistor at ball
01:pull down resistor programmed
1x: pull up resistor programmed
Configures KPX[7:0] for Open Drain or standard output functionality.
The Open Drain drive source is configured by GPIOOMS0.
Open Drain Enable on KPX[7:0]
0: full buffer
1: open drain functionality
34
Register Function
Register Function
Bit Function
Bit Function