CHAPTER3: Serial Programming Connection
1. Serial Programmer
P E R I P H E R A L M A N U A L
August 31, 2015, S6E1Cx_MN710-00016-1v0-E
53
CONFIDENTIAL
1.2. Pins Used
This section explains the used pins.
Table 1-2 Pins Used for Serial Write
Pins
Function
Supplement
MD0, MD1
Mode pin
Performing an external reset or turning on the power after setting
MD0=H and MD1=L enters the serial write mode.
When attaching a pull-up or pull-down resistor, avoid long wiring.
X0, X1
Oscillation pin
See the "Data Sheet" of a product used for the source oscillation clock
(main clock) frequencies that can be used in serial write mode.
(Restrictions apply to clock asynchronous communication. For details,
see Table 1-2.) In UART communication mode, the write operation is
available without main clock.
P01/SOT0_0
UART serial data
output pin/
When the communication mode is set to UART, this pin becomes a
serial data output pin when communication begins after the serial write
mode is activated.
P22/AN07
USB source
oscillating frequency
select pin
When the communication mode is set to USB, this pin controls the
frequency for source oscillation clock.
P22=L : source oscillation frequency : 8MHz
P22=H : source oscillation frequency: 48MHz
P03/SIN0_0
Clock synchronous/
asynchronous select
pin/UART serial data
input pin
Setting the input level of this pin to "H" until the start of
communication enables the clock asynchronous communication mode,
and setting it to "L" enables the clock synchronous communication
mode. When the communication mode is set to UART, this pin can be
used as a serial data input pin when communication begins after the
serial write mode is activated.
P60/INT15_1
Communication
mode select pin
The communication mode is determined by the input level of this pin at
reset to shift to the serial write mode.
Setting this pin to "H" enables the USB communication mode, and
setting it to "L" enables the UART communication mode.
P61/UHCONX Pull-up control pin
for UDP0
(for 64pin and 48pin
product)
This pin controls the pull-up of USB side (D+) when the
communication mode is USB.
UHCONX=L : Connect the pull-up resistor
UHCONX=H : Disconnect the pull-up resistor
P21
Pull-up control pin
for UDP0
(for 32pin and 26pin
product)
This pin controls the pull-up of USB side (D+) when the
communication mode is USB.
P21=L : Connect the pull-up resistor
P21=H : Disconnect the pull-up resistor
UDP0
USB I/O pin
This pin becomes an input/output pin of USB side (D+) when the
communication mode is set to USB.
UDM0
USB I/O pin
This pin becomes an input/output pin of USB side (D-) when the
communication mode is set to USB.
INITX
Reset pin
-
VCC
Power supply pin
For writing, supply power to the microcontroller from the user system.
VSS
GND pin
-
