em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 18

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78F648/644/642/641/548/544/542/541N
8-Bit Microcontroller
8 •
P50//SS
P51/TX/SO
P52/RX/SI
P53/SCK
P54/OSCI/RCOUT
P55/OSCO/ERCin
P56/TC2
P57/TC3/PDO
P60//INT
P61~P63
P64~P65
P66
(CLK)
P67
(DATA)
Name
4.2 EM78F644N / 544N Pin Description
Function
P61~P63
P64~P65
RCOUT
(DATA)
OSCO
ERCin
(CLK)
OSCI
PDO
SCK
TC2
TC3
/INT
P50
P51
P52
P53
P54
P55
P56
P57
P60
P66
P67
/SS
SO
RX
TX
SI
Input
Type
XTAL
AN
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
Output
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
Type
XTAL
Bidirectional I/O pin with programmable pull-down
SPI slave select pin
Bidirectional I/O pin with programmable pull-down
UART TX output
SPI serial data output
Bidirectional I/O pin with programmable pull-down
UART RX input
SPI serial data input
Bidirectional I/O pin with programmable pull-down
SPI serial clock input/output
Bidirectional I/O pin
Clock input of crystal/ resonator oscillator
Clock output of internal RC oscillator
Clock output of external RC oscillator(open-drain)
Bidirectional I/O pin
Clock output of crystal/ resonator oscillator
External RC input pin
Bidirectional I/O pin
Timer2 clock input
Bidirectional I/O pin
Timer3 clock input
Programmable divider output
Bidirectional I/O pin with programmable pull-down, open
drain, pull-high and pin change wakeup.
External interrupt pin
Bidirectional I/O pin with programmable pull-down, open
drain, pull-high and pin change wakeup.
Bidirectional I/O pin with programmable open-drain, pull-
high and pin change wakeup.
Bidirectional I/O pin with programmable open-drain, pull-
high and pin change wakeup.
CLOCK pin for Writer programming
Bidirectional I/O pin with programmable open-drain, pull-
high and pin change wakeup.
DATA pin for Writer programming
(This specification is subject to change without further notice)
Product Specification (V1.0) 05.05.2010
Description