Pin Description - IBM EM78M611E Specification

EM78M611E
Universal Serial Bus Series Microcontroller
6

Pin Description

Symbol I/O
P50 ~ P57 I/O
P60 ~ P67 I/O
P70 ~ P72
I/O
P76 ~ P77
P80 ~ P87 I/O
P90 ~ P93
I/O
P95 ~ P96
P94 / Vpp I
PWM1
O
PWM2
D+/CLK/P74 I/O
D-/DATA/P75 I/O
OSCI I
OSCO O
−
VNN
V3.3 PWR
VDD PWR
GND PWR
6 • • • •
General 8-bit bidirectional input/output port. All pins on this port can be
internally pulled-high by software control.
General 8-bit bidirectional input/output port. All pins on this port can be
internally pulled-high by software control.
LED sink pins
P76 ~ P77 will have an internally pulled-high resistor when the EM78M611E is
running in PS/2 mode.
General 8-bit bidirectional input/output port. All pins on this port can be
internally pulled-high by software control.
General 6-bit bidirectional input/output port. All pins on this port can be
internally pulled-high by software control or LED sink pins.
Input only. MTP program pin.
PWM output pins.
USB plus data line interface or CLK for PS/2 keyboard.
When the EM78M611E is running in PS/2 mode, this pin will have an internal
pulled-high resistor (2.2KΩ), with VDD=5.0V.
USB minus data line interface or DATA for PS/2 keyboard.
When the EM78M611E is running in PS/2 mode, this pin will have an internal
pulled-high resistor (2.2KΩ), with V
When the EM78M611E is running in USB mode, this pin will have an internal
pulled-high resistor (1.5KΩ), with VDD=3.3V.
6MHz / 12MHz ceramic resonator input.
Return path for 6MHz / 12MHz ceramic resonator.
MTP program pin. Used in programming the on-chip ROM. During normal
operation, this pin is connected to Ground.
3.3V regulator output
Power supply pin
Ground pin
Function
=3.3V.
3.3
Product Specification (V1.1) 11.22.2006
(This specification is subject to change without further notice)