S6E2HG Datasheet, PDF (55/161 Pages) SPANSION – fpu built-in

S6E2HG Series
Using an External Clock
When using an external clock as an input of the main clock, set X0/X1 to the external clock input, and input the clock to X0. X1(PE3)
can be used as a general-purpose I/O port.
Similarly, when using an external clock as an input of the sub clock, set X0A/X1A to the external clock input, and input the clock to
X0A. X1A (P47) can be used as a general-purpose I/O port.
Example of Using an External Clock
Device
Can be used as
general-purpose
I/O ports.
X0(X0A)
X1(PE3), X1A (P47)
Set as External clock
input
Handling when Using Multi-function Serial Pin as I²C Pin
If it is using the multi-function serial pin as I²C pins, P-ch transistor of digital output is always disabled.
However, I²C pins need to keep the electrical characteristic like other pins and not to connect to the external I²C bus system with
power OFF.
C Pin
This series contains the regulator. Be sure to connect a smoothing capacitor (CS) for the regulator between the C pin and the GND
pin. Please use a ceramic capacitor or a capacitor of equivalent frequency characteristics as a smoothing capacitor.
However, some laminated ceramic capacitors have the characteristics of capacitance variation due to thermal fluctuation (F
characteristics and Y5V characteristics). Please select the capacitor that meets the specifications in the operating conditions to use
by evaluating the temperature characteristics of a capacitor.
A smoothing capacitor of about 4.7 μF would be recommended for this series.
Device
C
CS
VSS
GND
Mode Pins (MD0)
Connect the MD pin (MD0) directly to VCC or VSS pins. Design the printed circuit board such that the pull-up/down resistance stays
low, as well as the distance between the mode pins and VCC pins or VSS pins is as short as possible and the connection
impedance is low, when the pins are pulled-up/down such as for switching the pin level and rewriting the Flash memory data. It is
because of preventing the device erroneously switching to test mode due to noise.
Document Number: 001-98943 Rev. *A
Page 55 of 161