MPC555
/
MPC556
SIGNAL DESCRIPTIONS
MOTOROLA
USER’S MANUAL
Rev. 15 October 2000
2-41
2.5.3.3 Type CNH Interface
The CNH pad type has a 3-V input with hysteresis but no pull-up or pull-down device.
Figure 2-7 Type CNH Interface
2.5.3.4 Type D Interface
This type of pad has a 3-V input and an internal pull-down resistor.
Figure 2-8 Type D Interface
2.5.4 Three-Volt Input/Output Pad
This is a 3-V bi-directional pad with a pull-up device. The drive strength for the output
driver can be configured for either a 25-pF or a 50-pF load. The SPRDS and OE sig-
nals control the pull-up devices.
3-V
Receiver
Pin
3 V
Data In
3-V
Receiver
Pin
3 V
Data In
Sprds
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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