upd78f0103hmca1-5a4-a Renesas Electronics Corporation., upd78f0103hmca1-5a4-a Datasheet - Page 233

• Manufacturer Part Number: upd78f0103hmca1-5a4-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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(4) Clock selection register 6 (CKSR6)
Address: FF56H After reset: 00H R/W
Notes 1.
Symbol
CKSR6
This register selects the base clock of serial interface UART6.
CKSR6 can be set by an 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Remark CKSR6 can be refreshed (the same value is written) by software during a communication operation
2.
(when bit 7 (POWER6) and bit 6 (TXE6) of ASIM6 = 1 or bit 7 (POWER6) and bit 5 (RXE6) of ASIM6
= 1).
Be sure to set the base clock so that the following condition is satisfied.
• V
• V
• V
• V
Note the following points when selecting the TM50 output as a base clock.
• PWM mode (TMC506 = 1)
• Mode in which the count clock is cleared and started upon a match of TM50 and CR50 (TMC506 = 0)
It is not necessary to enable the TO50 pin as a timer output pin in any mode.
TPS63
Start the operation of 8-bit timer/event counter 50 first and then set the base clock to make the duty
= 50%.
Start the operation of 8-bit timer/event counter 50 first and then enable the timer F/F inversion
operation (TMC501 = 1).
7
0
0
0
0
0
0
0
0
0
1
1
1
1
DD
DD
DD
DD
= 4.0 to 5.5 V: Base clock ≤ 10 MHz
= 3.3 to 4.0 V: Base clock ≤ 8.38 MHz
= 2.7 to 3.3 V: Base clock ≤ 5 MHz
= 2.5 to 2.7 V: Base clock ≤ 2.5 MHz (standard products, (A) grade products only)
Figure 12-8. Format of Clock Selection Register 6 (CKSR6)
TPS62
Other than above
6
0
0
0
0
0
1
1
1
1
0
0
0
0
CHAPTER 12 SERIAL INTERFACE UART6
TPS61
5
0
0
0
1
1
0
0
1
1
0
0
1
1
User’s Manual U16846EJ3V0UD
TPS60
4
0
0
1
0
1
0
1
0
1
0
1
0
1
f
f
f
f
f
f
f
f
f
f
f
TM50 output
Setting prohibited
X
X
X
X
X
X
X
X
X
X
X
/2 (5 MHz)
/2
/2
/2
/2
/2
/2
/2
/2
/2
(10 MHz)
TPS63
2
3
4
5
6
7
8
9
10
(2.5 MHz)
(1.25 MHz)
(625 kHz)
(312.5 kHz)
(156.25 kHz)
(78.13 kHz)
(39.06 kHz)
(19.53 kHz)
(9.77 kHz)
3
Base clock (f
Note 2
TPS62
2
XCLK6
) selection
TPS61
1
Note 1
TPS60
0
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