em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 17

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

Legend: ST: Schmitt Trigger input, AN: analog pin, CMOS: CMOS output,
Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
P77/TCC
P80/CO2
(DATA)
P81/CIN2+
(CLK)
P82/CIN2-
P83/RESET
(/RESET)
P84~P87
P90~P97
VDD
VSS
Name
XTAL: oscillation pin for crystal/ resonator
(Continuation)
Function
(/RESET)
P84~P87
P90~P97
/RESET
(DATA)
CIN2+
(CLK)
CIN2-
TCC
VDD
CO2
VSS
P77
P80
P81
P82
P83
Input
power
power
Type
ST
AN
ST
AN
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
Output
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
Type
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
Real Time Clock/Counter clock input
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
Output of comparator2
DATA pin for Writer programming
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
Non-inverting end of comparator2
CLOCK pin for Writer programming
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
Inverting end of Comparator 2
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
Internal pull-high reset pin
/RESET pin for Writer programming
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
Power
Ground
EM78F648/644/642/641/548/544/542/541N
Description
8-Bit Microcontroller
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