UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 470

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

16.4.4 Baud Rate Setting in Asynchronous Serial Interface Mode
method for each case.
430
Baud rate generator
There are two methods of setting the baud rate, as shown in Table 16-3.
This table shows the range of baud rates that can be generated, the baud rate calculation expression and selection
f
k
n
f
* Including f
XX
ASCK
: Oscillator frequency or external clock input
: Value set in bits MDL3 to MDL0 of BRGC (k = 0 to 14; see Figure 16-15)
: Value set in bits TPS3 to TPS0 of BRGC (n = 0 to 11; see Figure 16-15)
: ASCK input clock frequency (0 – f
Baud Rate Clock Source
ASCK
input range: (0 – f
Internal system clock
ASCK input
CHAPTER 16 ASYNCHRONOUS SERIAL INTERFACE/3-WIRE SERIAL I/O
Table 16-3 Baud Rate Setting Methods
XX
/256)
SCK in ASIM = 1
SCK in ASIM = 0
XX
/4)
Selection Method
Baud Rate Calculation
Expression
(
k
16 2
f
2
ASCK
f
n
XX
)
6
n
3
Baud Rate Range
131072
491520
f
ASCK
f
XX
–
–
f
ASCK
128
f
64
XX
*