參數(shù)資料
型號(hào)： T9000
英文描述： ISDN Network Termination Node (NTN) Device
中文描述： ISDN網(wǎng)絡(luò)終端節(jié)點(diǎn)（新界北）設(shè)備
文件頁數(shù)： 102/126頁
文件大?。?/td> 2127K
代理商： T9000
102
Lucent Technologies Inc.
Preliminary Data Sheet
November 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 (see pulse-width range below).
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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