s3c2410a Samsung Semiconductor, Inc., s3c2410a Datasheet - Page 285

• Manufacturer Part Number: s3c2410a
• Description: 16/32-bit Risc Arm Microprocessor
• Manufacturer: Samsung Semiconductor, Inc.

S3C2410A
PWM TIMER OPERATION
PRESCALER & DIVIDER
An 8-bit prescaler and a 4-bit divider make the following output frequencies:
BASIC TIMER OPERATION
A timer (except the timer ch-5) has TCNTBn, TCNTn, TCMPBn and TCMPn. (TCNTn and TCMPn are the names of
the internal registers. The TCNTn register can be read from the TCNTOn register) The TCNTBn and the TCMPBn are
loaded into the TCNTn and the TCMPn when the timer reaches 0. When the TCNTn reaches 0, an interrupt request
will occur if the interrupt is enabled.
1/16 (PCLK = 66.5 MHz)
1/2 (PCLK = 66.5 MHz)
1/4 (PCLK = 66.5 MHz)
1/8 (PCLK = 66.5 MHz)
4-bit divider settings
TCMPn
TCNTn
TOUTn
TCNTBn=3
TCNTBn=1
Manual update=1
Auto-reload=1
Start bit=1
3
Timer is started TCNTn=TCMPn
0.0300 us (33.2500 MHz)
0.0601 us (16.6250 MHz)
0.1203 us ( 8.3125 MHz)
0.2406 us ( 4.1562 MHz)
Minimum resolution
3
TCNTBn=2
TCNTBn=0
Manual update=0
Auto-reload=1
(prescaler = 0)
1
2
Figure 10-2. Timer Operations
1
Interrupt request
0
Auto-reload
7.6992 us (129.8828 KHz)
15.3984 us (64.9414 KHz)
30.7968 us (32.4707 KHz)
61.5936 us (16.2353 KHz)
Auto-reload
Maximum resolution
(prescaler = 255)
2
TCNTn=TCMPn
1
Interrupt request
0
0
Timer is stopped
0
Maximum interval
(TCNTBn = 65535)
Command
Status
0.5045 sec
1.0091 sec
2.0182 sec
4.0365 sec
PWM TIMER
10-3