参数资料
型号: T9000
厂商: Lineage Power
英文描述: ISDN Network Termination Node (NTN) Device(ISDN网络终端节点器件)
中文描述: ISDN网络终端节点(新界西)设备(ISDN网网络终端节点器件)
文件页数: 100/126页
文件大小: 1523K
代理商: T9000
100
Lucent Technologies Inc.
Advance Data Sheet
April 2000
ISDN Network Termination Node (NTN) Device
T9000
12 PWM Module
(continued)
12.5 PWM Powerdown Mode
Each PWM generator can be powered down by setting PWxCF (PwxE) register bit to 0.
12.6 PWM Module Register Set
Table 104. PW0CF: Pulse-Width Modulator 0 Configuration (0x44)
Reg
PW0CF
RESET
R/W
R/W
Default
Bit 7
PW0_E
0
Bit 6
Bit 5
PW0IE
0
Bit 4
PW0G.2
Bit 3
PW0G.1
Bit 2
PW0G.0
Bit 1
PW0R.1
Bit 0
PW0R.0
PW0AUTO
Bit #
7
Symbol
PW0_E
Name/Description
PWM
0 Enable.
0: Powerdown mode. PWMO0 output is maintained at 0.
1: Pulse-width modulator enabled. In a normal operation, this register should be set
after defining PP0.
PWM
0 Auto/Manual Operation Mode.
6
PW0AUTO
0: Manual/timer operation mode.
1: Sine modulator activated.
PWM
0 Interrupt Enable.
5
PW0IE
0: Interrupt disabled.
1: Interrupt enabled.
PWM
0 Granularity.
This parameter defines the granularity of the output pulse; i.e., the
minimum pulse width at high (tick0). Pulse period and pulse width are multiples of the
tick0 value (see pulse-width range below).
4—2
PW0G.[2:0]
000: Granularity = 1
001: Granularity = 2
010: Granularity = 4
011: Granularity = 8
1XX: Granularity = 16
PWM
0 Range.
This parameter defines the number of different values the pulse width can
take. Pulse period (PP0) is a function of the pulse-width granularity and the pulse-width
range, as follows:
tick0 = 65 ns.
tick0 = 130 ns.
tick0 = 260 ns.
tick0 = 521 ns.
tick0 = 1042 ns.
1—0
PW0R.[1:0]
00: Range = 32
01: Range = 64
10: Range = 128
11: Range = 256
PP0 = 32 * tick ns.
PP0 = 64 * tick ns.
PP0 = 128 * tick ns.
PP0 = 256 * tick ns.
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