Cypress S6E2C1 Series, Руководство пользователя

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Serial Programming Connection
S6E2CC/C5/C4/C3/C2/C1 Series Flash Programming Specification, Document Number: 002-04913 Rev. *D 70
3.1.2 Pins Used
This section explains the used pins.
Table 3-4 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" 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
3-2
.)
P22/SOT0_0
UART serial data output pin/
USB source oscillating
frequency select 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.
When the communication mode is set to USB, this pin controls the frequency for
source oscillation clock.
P22=L: source oscillation frequency: 4 MHz
P22=H: source oscillation frequency: 48 MHz
P21/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
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
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
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.
USBVCC Power supply pin for USB I/O -
VSS GND pin -
Note:
−
Note that initial states of un-used pins in the serial writer mode are the same as initial states of them in the user
mode. Refer to “Pin Status in Each CPU State” section in "Data Sheet" of the product used and relevant chapters in
the "FM4 Family Peripheral Manual".