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: 103/126页
文件大小: 1523K
代理商: T9000
Lucent Technologies Inc.
103
Advance Data Sheet
April 2000
ISDN Network Termination Node (NTN) Device
T9000
12 PWM Module
(continued)
12.6 PWM Module Register Set
(continued)
Table 108. PW1VH: Pulse-Width Modulator 1 Pulse-Width Value, High Byte (0x48)
Table 109. PW1VL: Pulse-Width Modulator 1 Pulse-Width Value, Low Byte (0x49)
Table 110
.
PWIR: Pulse-Width Modulator Interrupt Register (0x4A)
Note:
All bits in this register are set to 1 upon occurrence of the corresponding interrupt condition, and are cleared
to 0 when the register is read.
Reg
PW1VH
RESET
R/W
R/W
Default
Bit 7
PW1VH7
Bit 6
PW1VH6
Bit 5
PW1VH5
Bit 4
PW1VH4
Bit 3
PW1VH3
Bit 2
PW1VH2
Bit 1
PW1VH1
Bit 0
PW1VH0
Bit #
7—0
Symbol
PW1VH[7:0]
Name/Description
PWM
1 Pulse-Width Value, High Byte.
When manual pulse-width control is pro-
grammed, the pulse-width high can be expressed as follows:
PW1 = PW1VH[7:0] * tick when PW1R.[1:0] = 11.
PW1 = PW1VH[7:1] * tick when PW1R.[1:0] = 10.
PW1 = PW1VH[7:2] * tick when PW1R.[1:0] = 01.
PW1 = PW1VH[7:3] * tick when PW1R.[1:0] = 00.
If auto mode is selected, it contains the high-order byte of the programmed sine fre-
quency (Fs).
Reg
PW1VL
RESET
R/W
R/W
Default
Bit 7
PW1VL7
Bit 6
PW1VL6
Bit 5
PW1VL5
Bit 4
PW1VL4
Bit 3
PW1VL3
Bit 2
PW1VL2
Bit 1
PW1VL1
Bit 0
PW1VL0
Bit #
7—0
Symbol
PW1VL[7:0]
Name/Description
PWM
#
1 Pulse-Width Value, Low Byte.
Its function depends on the operation mode
selected.
When auto operation mode is selected (PW1CF[PW1AUTO] = 1), it contains the low-
order byte of the programmed sine frequency (Fs).
When manual/timer operation mode is selected (PW1CF[PW1AUTO] = 0), it defines the
rate at which PWIR[PW1I] interrupt register bit will be asserted:
PWIR[PW1I] assertion rate = PP1 x (PW1VL + 1).
Reg
PWIR
RESET
R/W
R
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
PW1I
0
Bit 0
PW0I
0
Bit #
7—2
1—0
Symbol
PWxI
Name/Description
Reserved.
PWM
x Interrupt.
This interrupt occurs only in manual/timer mode (PWxAUTO = 0).
Once the current PWV value initiates the PWM output waveform, this interrupt is
asserted to indicate to the microcontroller that it should load a new value within
PPx * (PWxVL + 1) ns. If the microcontroller does not load a new value within this win-
dow, the previously loaded value will be used to generate the new pulse. PWxCF[PWxIE]
is the enable bit for this interrupt.
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