Samsung Exynos 5 User Manual

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-7  
10.3.3 Auto-Reload and Double Buffering 
The PWM Timers includes a double buffering feature, which changes the reload value for the next Timer operation 
without stopping the current Timer operation.  
The Timer value is written into TCNTBn (Timer Count Buffer register) and the current counter value of the Timer is 
read from TCNTOn (Timer Count Observation register). If TCNTBn is Read, the Read value does not reflect the...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-8  
10.3.4 Timer Operation  
Figure 10-5 illustrates an example of Timer Operation: 
 
    Figure 10-5   Timer Operation 
Steps in Timer Operation: 
1. Enable the Auto-reload feature. Set the TCNTBn as 159 (50 + 109) and TCMPBn as 109. Set the manual  
 update bit On and set the manual update bit Off. Set the inverter On/Off bit. The manual update bit sets  
 TCNTn and TCMPn to the value of TCNTBn and TCMPBn.  
2. Set TCNTBn and...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-9  
10.3.5 Initialize Timer (Setting Manual-Up Data and Inverter) 
User must define the starting value of the TCNTn, because an Auto-reload operation of the Timer occurs when the 
down counter reaches 0. In this case, the starting value must be loaded by manual update bit.  
The sequence to start a Timer is: 
1. Write the initial value into TCNTBn and TCMPBn. 
2. Set the manual update bit and clear only manual update bit of the...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-10  
10.3.7 Output Level Control 
Figure 10-7 illustrates an example of inverter On/Off: 
 
    Figure 10-7   Inverter On/Off 
Steps to maintain TOUT as high or low (assume that inverter is off): 
1. Turn-off the Auto-reload bit. The TOUTn goes to high level and the Timer is stopped after TCNTn reaches 0.  
 This method is recommended. 
2. Stop the timer by clearing the timer start/stop bit to 0. When TCNTn TCMPn, the output level...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-11  
10.3.8 Dead Zone Generator 
This feature inserts the time gap between a Turn-off and Turn-on of two different switching devices. This time gap 
prohibits the two switching device turning on simultaneously, even for a very short time. 
TOUT_0 specifies the PWM output. nTOUT_0 specifies the inversion of the TOUT_0. When the dead-zone is 
enabled, the output wave-form of TOUT_0 and nTOUT_0 is TOUT_0_DZ and nTOUT_0_DZ,...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-12  
10.4 I/O Description 
Signal I/O Description Pad Type 
TOUT_0 Output PW MTIMER TOUT[0] XpwmTOUT[0] muxed 
TOUT_1 Output PW MTIMER TOUT[1] XpwmTOUT[1] muxed 
TOUT_2 Output PW MTIMER TOUT[2] XpwmTOUT[2] muxed 
TOUT_3 Output PW MTIMER TOUT[3] XpwmTOUT[3] muxed 
NOTE: Type field indicates whether pads are dedicated to the signal, or pads are connected to the multiplexed signals.  
 
 
 
 
  

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-13  
10.5 Register Description 
10.5.1 Register Map Summary 
 Base Address: 0x12DD_0000 (PWM) 
 Base Address: 0x1316_0000 (PWM_ISP) 
Register Offset Description Reset Value 
TCFG0 0x0000 Specifies the timer configuration register 0 that configures the 
two 8-bit prescaler and dead zone length 0x0000_0101 
TCFG1 0x0004 Specifies the timer configuration register 1 that controls 5 MUX 
select bit 0x0000_0000 
TCON 0x0008 Specifies...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-14  
10.5.1.1 TCFG0  
 Base Address: 0x12DD_0000 (PWM) 
 Base Address: 0x1316_0000 (PWM_ISP) 
 Address = Base Address + 0x0000, Reset Value = 0x0000_0101 
Name Bit  Type Description Reset Value 
RSVD [31:24] –=Reserved Bits=0x00=
Dead zone length=[23:16]=RW=Dead Zone Length==0x00=
Prescaler 1=[15:8]=RW=Prescaler 1=value for Timer=2, 3=and=4=0x01=
Prescaler 0=[7:0]=RW=Prescaler 0=value for Timer 0=and=1=0x01=
=
Timer fnput=Clock...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-15  
10.5.1.2 TCFG1  
 Base Address: 0x12DD_0000 (PWM) 
 Base Address: 0x1316_0000 (PWM_ISP) 
 Address = Base Address + 0x0004, Reset Value = 0x0000_0000 
Name Bit  Type Description Reset Value 
RSVD [31:20] –=Reserved Bits=0x000=
Divider MUX4=[19:16]=RW=
Selects=MUX input for PWM Timer 4=
0000== 1/1=
0001== 1/2=
0010 = 1/4=
0011== 1/8=
0100 = 1/1S=
0x0=
Divider MUX3=[15:12]=RW=
Selects=MUX input for PWM Timer 3=
0000== 1/1=...

Samsung Confidential  
Exynos 5250_UM 10 Pulse Width Modulation Timer 
 10-16  
10.5.1.3 TCON  
 Base Address: 0x12DD_0000 (PWM) 
 Base Address: 0x1316_0000 (PWM_ISP) 
 Address = Base Address + 0x0008, Reset Value = 0x0000_0000 
Name Bit  Type Description Reset Value 
RSVD [31:23] –=Reserved Bits=0x000=
Timer 4=auto=
reload on/off =[22]=RW=0===lne-phot=
1== fnterval Mode=(Auto-oeload)=0x0=
Timer 4=manual=
update=[21]=RW=0===No lperation=
1 = rpdates TCNTB4=0x0=
Timer 4=start/stop=[20]=RW=0===ptops=...