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: 102/126页
文件大小: 1523K
代理商: T9000
102
Lucent Technologies Inc.
Advance Data Sheet
April 2000
ISDN Network Termination Node (NTN) Device
T9000
12 PWM Module
(continued)
12.6 PWM Module Register Set
(continued)
Table 107. PW1CF: Pulse-Width Modulator 1 Configuration (0x47)
Reg
PW1CF
RESET
R/W
R/W
Default
Bit 7
PW1_E
0
Bit 6
Bit 5
PW1IE
0
Bit 4
PW1G.2
Bit 3
PW1G.1
Bit 2
PW1G.0
Bit 1
PW1R.1
Bit 0
PW1R.0
PW1AUTO
Bit #
7
Symbol
PW1_E
Name/Description
PWM
1 Enable.
0: Powerdown mode. PWMO1 output is maintained at 0.
1: Pulse-width modulator enabled. In a normal operation, this register should be set
after defining PP1.
PWM
1 Auto/Manual Operation Mode.
6
PW1AUTO
0: Manual programming.
1: Sine modulator activated.
PWM
1 Interrupt Enable.
5
PW1IE
0: Interrupt disabled.
1: Interrupt enabled.
PWM 1 Granularity.
This parameter defines the granularity of the output pulse; i.e., the
minimum pulse width at high (tick1). Pulse period and pulse width are multiples of the
tick1 value (see pulse-width range below).
4—2
PW1G.[2:0]
000: Granularity = 1
001: Granularity = 2
010: Granularity = 4
011: Granularity = 8
1XX: Granularity = 16
PWM
1 Range.
This parameter defines the number of different values the pulse width can
take. Pulse period (PP1) is a function of the pulse width granularity and the pulse width
range, as follows:
tick1 = 65 ns.
tick1 = 130 ns.
tick1 = 260 ns.
tick1 = 521 ns.
tick1 = 1042 ns.
1—0
PW1R.[1:0]
00: Range = 32
01: Range = 64
10: Range = 128
11: Range = 256
PP1 = 32 * tick1 ns.
PP1 = 64 * tick1 ns.
PP1 = 128 * tick1 ns.
PP1 = 256 * tick1 ns.
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