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Serial Interfaces
UART Mode Baud Rates
MN102H75K/F75K/85K/F85K LSI User Manual Panasonic Semiconductor Development Company
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Panasonic
5.4 UART Mode Baud Rates
In UART mode, the serial interface transfer clock is set to 16 times the baud rate
clock. The expression below is the formula for calculating the baud rate for the
UART mode. Table 5-2 shows the baud rate settings when B
OSC
= 24 MHz.
5.5 Serial Interface Timing
5.5.1 Synchronous Serial Mode Timing
In these timing charts, the character length is 8 bits and there is parity.
Table 5-2 Example Baud Rate Settings for the UART Mode
Baud Rate Timer 0/1 Divide-by Ratio
19200
9600
4800
2400
1200
600
300
39
78
156
313
625
1250
2500
Figure 5-5 Synchronous Serial Transmission Timing
baud rate (bps)
B
OSC
32 (timer divisor)×
-----------------------------------------------=
SBO
SBT
Data write
TXBUSY
Tx interrupt
b0 b1 b2 b3 b4 b5 b6 b7
PTY
Tx