Epson S1V3G340 Hardware Specification page 14

5. Function Description
SHISEL
1
0
0
1
1
Note:
• The asynchronous serial interface (UART) is not available when the selected system clock frequency is
12.288 MHz.
• The maximum transfer speed of the I2C interface is 83.3 kHz. This maximum transfer speed is based on
the I2C bus rising time of 480 ns or less. It should be noted that the maximum transfer speed will be
lower if the I2C bus rising time exceeds 480 ns due to the load capacity and pull-up resistance.
• When using the I2C interface, it is recommended to use the sequence playback.
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Table 5.3 shows the pin states when hardware resetting is enabled (NRESET=L).
Table 5.3 States when hardware resetting is enabled (serial interface)
Interface
0
Clock
0
synchronous
1
UART
1
0 I2C
States for NRESET=L
(L: L-level output, H: H-level output, Z; High-impedance)
SCKS SIS
NSCSS input level
Z Z
L (when NSCSS = L)
Z (when NSCSS = H)
Z Z
Z Z
EPSON
SOS NSCSS
Dependent on
Z
H Z
Z Z
S1V3G340 Hardware Specification
(Rev. 1.0)