MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 19

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

3.5 Port Pull-Up, Pull-Down and Reduced Drive
MC68HC912B32
MC68HC912B32TS/D
PE7, PE3,
PE2, PE0
Port DLC
Port AD
PE[6:4]
PE[6:5]
PS[3:2]
PS[7:4]
Port E:
BKGD
Name
Port A
Port B
Port P
Port S
Port T
Port
PE1
MCU ports can be configured for internal pull-up. To reduce power consumption and RFI, the pin output
drivers can be configured to operate at a reduced drive level. Reduced drive causes a slight increase
in transition time depending on loading and should be used only for ports which have a light loading.
Table 7 summarizes the port pull-up default status and controls.
Input Loads
Resistive
Pull-down
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
None
None
Table 7 Port Pull-Up, Pull-Down and Reduced Drive Summary
DLCSCR ($00FD) DLCPUE
PURDS ($00DB)
PURDS ($00DB)
PURDS ($00DB)
PWCTL ($0054)
TMSK2 ($008D)
PUCR ($000C)
PUCR ($000C)
PUCR ($000C)
(Address)
Register
—
Enabled During Reset
Always Enabled
Enable Bit
Bit Name Reset State
—
PUPS0
PUPS1
PUPS2
—
PUPA
PUPB
PUPE
PUPP
PUPT
—
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Enabled
Enabled
DLCSCR ($00FD) DLCRDV
PURDS ($00DB)
PURDS ($00DB)
PURDS ($00DB)
PWCTL ($0054)
TMSK2 ($008D)
RDRIV ($000D)
RDRIV ($000D)
RDRIV ($000D)
RDRIV ($000D)
RDRIV ($000D)
(Address)
Register
Reduced Drive Control Bit
—
—
Bit Name
—
RDPS0
RDPS1
RDPS2
RDPA
RDPB
RDPE
RDPE
RDPE
RDPP
RDPT
—
—
MOTOROLA
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Full Drive
Reset
State
—
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