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