mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 60

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Pinout and Signal Descriptions
3.5.15 Port Pull-Up Pull-Down and Reduced Drive
Technical Data
60
Port CAN1[1]
Port CAN1[0]
Port CAN0[1]
Port CAN0[0]
PE7, PE[3:2]
Port IB[7:4]
Port IB[3:2]
Port AD0
Port AD1
PE[1:0]
PE[6:4]
Port E:
Port H
Name
Port A
Port B
Port K
Port P
Port S
Port T
Port J
Port
Input Loads
Table 3-4. Port Pull-Up, Pull-Down and Reduced Drive Summary
Resistive
Pull-down
Pull-down
Pull-up or
Pull-up or
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
Pull-up
None
None
None
None
None
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.
down default status and controls.
SP0CR2 ($00D1)
IBPURD ($00E5)
PWCTL ($0054)
TMSK2 ($008D)
PUCR ($000C)
PUCR ($000C)
PUCR ($000C)
PUCR ($000C)
PUCR ($000C)
PUCR ($000C)
PUCR ($000C)
Freescale Semiconductor, Inc.
Always enabled when pins are input
(Address)
For More Information On This Product,
Register
Pinout and Signal Descriptions
Always enabled
Always enabled
Go to: www.freescale.com
Enable Bit
—
—
—
—
—
Bit Name
PUPIB
PUPB
PUPE
PUPE
PUPH
PUPK
PUPP
PUPS
PUPA
PUPJ
TPU
Table 3-4
Disabled RDRIV ($000D)
Disabled RDRIV ($000D)
Disabled RDRIV ($000D)
Disabled RDRIV ($000D)
Disabled RDRIV ($000D)
Disabled PWCTL ($0054)
Disabled TMSK2 ($008D)
Disabled IBPURD ($00E5)
Enabled
Enabled
Enabled SP0CR2 ($00D1)
Reset
State
IBPURD ($00E5)
summarizes the port pull-up/pull-
RDRIV ($000D)
RDRIV ($000D)
(Address)
Register
Reduced Drive Control Bit
MC68HC912DG128 — Rev 3.0
Bit Name
—
—
—
—
—
—
—
RDPIB
RDPIB
RDPB
RDPE
RDPE
RDPH
RDPK
RDPP
RDPS
RDPA
TDRB
RDPJ
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