em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 15

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

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Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
P50//SS
P51/SDA/TX/SO
P52/RX/SI
P53/SCK/SCL
Name
Pin Description
3.4 EM78F641N / 541N Pin Assignment
4.1 EM78F648N / 548N Pin Description
18-Pin DIP/SOP
Function
SDA
SCK
SCL
P50
P51
P52
P53
/SS
SO
RX
TX
SI
Figure 3-4 EM78F641N / 541N Pin Assignment
Input
Type
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.
SPI slave select pin
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
UART TX output
SPI serial data output
I2C serial data(open-drain)
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
UART RX input
SPI serial data input
Bidirectional I/O pin with programmable pull-down, open-
drain, pull-high, high sink and high drive.
SPI serial clock input/output
I2C serial clock (open-drain)
EM78F648/644/642/641/548/544/542/541N
20-Pin DIP/SOP/SSOP
Description
8-Bit Microcontroller
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