Chapter 13
Serial Interface
XIII - 30
Clock-Synchronous Communication
Setting of Transfer Clock (SCnCLK)
SCIFn (n = 0, 1) operates with SCnCLK which is generated based on BRTM output clock (BRTM_SCnCLK).
When SCnMD1.SCnCKM is "0", SCnCLK is the same as BRTM_SCnCLK.
When SCnMD1.SCnCKM is "1", SCnCLK is as follows:
When SCnMD1.SCnDIV is "0", SCnCLK is BRTM_SCnCLK divided by 8.
When SCnMD1.SCnDIV is "1", SCnCLK is BRTM_SCnCLK divided by 16.
SCnCLK of SCIF (n = 2, 3) is the same as BRTM_SCnCLK.
When the LSI is a master, SCnCLK is output from SBTn as a transfer clock.
When the LSI is a slave, set the frequency of SCnCLK to the value faster than the transfer clock’s and as close to
the transfer clock’s as possible.
Generating Baud Rate Timer Output Clock (BRTM_SCnCLK)
SCIFn has a dedicated Baud Rate Timer (BRTMn).
Select a count clock for BRTMn with BRTM_S_CKSEL, BRTM_S01_CK, and BRTM_S23_CK.
When BRTM_S_EN.BRTM_Sn_EN is set to "1", the binary counter of BRTMn (BRTM_Sn_BC) starts counting
up. When BRTM_Sn_BC becomes equal to BRTM_Sn_OC, BRTM_Sn_BC is cleared at the next count clock
and restarts counting up.
While the duty of BRTM_SCnCLK is "1:1" (BRTM_S_MD.BRTM_Sn_MD is "0"), the cycle and operation of
BRTMn are shown in the figure below.
BRTM_SnCLK Cycle = 2
×
(N + 1)
×
Count Clock Cycle (N: Setting value of BRTM_Sn_OC)
Figure:13.3.1 BRTMn Count Operation (Duty: 1:1, Count Clock: HCLK, N: 0x00)
Figure:13.3.2 BRTMn Count Operation (Duty: 1:1, Count Clock: HCLK, N: 0x01)
8'h00
HCLK
SYSCLK
BRTM_Sn_EN
BRTN_Sn_BC
BRTM_SnCLK
8'h00
8'h01 8'h00 8'h01 8'h00 8'h01 8'h00 8'h01 8'h00 8'h01 8'h00 8'h01
HCLK
SYSCLK
BRTM_Sn_EN
BRTN_Sn_BC
BRTM_SnCLK
Содержание MN101L Series
Страница 1: ...Cover MICROCOMPUTER MN101L MN101LR05D 04D 03D 02D LSI User s Manual Pub No 21705 015E ...
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Страница 11: ...Contents Contents 0 ...
Страница 22: ... Contents 11 ...
Страница 23: ...I Chapter 1 Overview 1 ...
Страница 62: ...Chapter 1 Overview I 40 Cautions for Circuit Setup ...
Страница 63: ...II Chapter 2 CPU 2 ...
Страница 94: ...Chapter 2 CPU II 32 Reset ...
Страница 95: ...III Chapter 3 Interrupts 3 ...
Страница 143: ...IV Chapter 4 Clock Mode Voltage Control 4 ...
Страница 175: ...V Chapter 5 Watchdog Timer WDT 5 ...
Страница 180: ...Chapter 5 Watchdog Timer WDT V 6 Operation ...
Страница 181: ...VI Chapter 6 Power Supply Voltage Detection 6 ...
Страница 189: ...VII Chapter 7 I O Port 7 ...
Страница 248: ...Chapter 7 I O Port VII 60 Port 8 ...
Страница 249: ...VIII Chapter 8 8 bit Timer 8 ...
Страница 282: ...Chapter 8 8 bit Timer VIII 34 8 bit Timer Cascade Connection ...
Страница 283: ...IX Chapter 9 16 bit Timer 9 ...
Страница 346: ...Chapter 9 16 bit Timer IX 64 IGBT Output with Dead Time ...
Страница 347: ...X Chapter 10 General Purpose Time Base Free Running Timer 10 ...
Страница 361: ...XI Chapter 11 RTC Time Base Timer RTC TBT 11 ...
Страница 371: ...XII Chapter 12 Real Time Clock RTC 12 ...
Страница 389: ...XIII Chapter 13 Serial Interface 13 ...
Страница 458: ...Chapter 13 Serial Interface XIII 70 IIC Communication ...
Страница 459: ...XIV Chapter 14 DMA Controller 14 ...
Страница 472: ...Chapter 14 DMA Controller XIV 14 DMA Data Transfer ...
Страница 473: ...XV Chapter 15 Buzzer 15 ...
Страница 479: ...XVI Chapter 16 A D Converter ADC 16 ...
Страница 493: ...XVII Chapter 17 LCD 17 ...
Страница 530: ...Chapter 17 LCD XVII 38 LCD Display Examples ...
Страница 531: ...XVIII Chapter 18 ReRAM 18 ...
Страница 538: ...Chapter 18 ReRAM XVIII 8 Command Library ...
Страница 539: ...XIX Chapter 19 On Board Debugger 19 ...
Страница 542: ...Chapter 19 On Board Debugger XIX 4 List of on board debugging functions ...
Страница 543: ...XX Chapter 20 Appendix 20 ...
Страница 555: ...Chapter 20 Appendix Instruction map XX 13 ...