mc68hc912bd32 Freescale Semiconductor, Inc, mc68hc912bd32 Datasheet - Page 35

• Manufacturer Part Number: mc68hc912bd32
• Description: 16-bit Device Composed Of Standard On-chip Peripherals
• Manufacturer: Freescale Semiconductor, Inc

Port Pull-Up, Pull-Down and Reduced Drive
15-pins
PE7, PE[3:0]
PSBI[5:2]
Port SBI
DIVBYP
PE[7:0]
PP[7:0]
PS[7:0]
PT[7:0]
RxSBI
Name
TxSBI
Port E
Port P
Port S
Port T
Port
PE[6:4]
PE[6:5]
Port E:
Name
Port A
Port B
Port
79, 80, 1–6
16–12, 9–7
Numbers
26–29,
70–76
35–38
68–61
Resistive
Pull-down
Table 8 Port Pull-Up, Pull-Down and Reduced Drive Summary
Pin
Pull-up
Pull-up
Pull-up
Loads
Input
None
Table 7 MC68HC912BD32 Port Description Summary
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.
status and controls.
RxSBI, DIVBYP In
DDRSBI ($0112)
Data Direction
DDRS ($00D7)
PUCR ($000C)
PUCR ($000C)
PUCR ($000C)
DDRE ($0009)
DDRP ($0057)
DDRT ($00AF)
PE[7:2] In/Out
DD Register
Freescale Semiconductor, Inc.
for PSBI[5:2]
(Address)
TxSBI Out
(Address)
PE[1:0] In
Register
For More Information On This Product,
In/Out
In/Out
In/Out
In/Out
Enabled During Reset
Pinout and Signal Descriptions
Go to: www.freescale.com
Enable Bit
—
Name
PUPB
PUPE
PUPA
Byteflight™ subsystem with Tx output, Rx and divider bypass
input and general-purpose I/O on
PSBI[5:2].
Mode selection, bus control signals and interrupt service
request signals; or general-purpose I/O.
General-purpose I/O. PP[3:0] are use with the pulse-width
modulator when enabled.
Serial communications interface and serial peripheral
interface subsystems and general-purpose I/O.
General-purpose I/O when not enabled for input capture and
output compare in the timer and pulse accumulator
subsystem.
Bit
Disabled
Disabled
Enabled
Table 8
Reset
State
Port Pull-Up, Pull-Down and Reduced Drive
summarizes the port pull-up default
RDRIV ($000D)
RDRIV ($000D)
RDRIV ($000D)
RDRIV ($000D)
(Address)
Description
Register
Reduced Drive Control Bit
—
Pinout and Signal Descriptions
MC68HC912BD32 Rev 1.0
Name
RDPB
RDPE
RDPE
RDPA
Bit
—
Full Drive
Full Drive
Full Drive
Full Drive
Reset
State
—