T9000
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
12 PWM Module (continued)
12.6 PWM Module Register Set (continued)
Table 105. PW0VH: Pulse-Width Modulator 0 Pulse-Width Value, High Byte (0x45)
Reg
R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PW0VH
R/W
PW0VH7 PW0VH6 PW0VH5 PW0VH4 PW0VH3 PW0VH2 PW0VH1 PW0VH0
RESET Default
—
—
—
—
—
—
—
—
Bit #
Symbol
Name/Description
7—0 PW0VH[7:0] PWM 0 Pulse-Width Value, High Byte. When manual pulse-width control is pro-
grammed, the pulse-width high can be expressed as:
PW0 = PW0VH[7:0] * tick when PW0R.[1:0] = 11.
PW0 = PW0VH[7:1] * tick when PW0R.[1:0] = 10.
PW0 = PW0VH[7:2] * tick when PW0R.[1:0] = 01.
PW0 = PW0VH[7:3] * tick when PW0R.[1:0] = 00.
If auto mode is selected, it contains the high-order byte of the programmed sine fre-
quency (Fs).
Table 106. PW0VL: Pulse-Width Modulator 0 Pulse-Width Value, Low Byte (0x46)
Reg
R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PW0VL
R/W
PW0VL7 PW0VL6 PW0VL5 PW0VL4 PW0VL3 PW0VL2 PW0VL1 PW0VL0
RESET Default
—
—
—
—
—
—
—
—
Bit #
Symbol
Name/Description
7—0
PW0VL[7:0] PWM 0 Pulse-Width Value, Low Byte. Its function depends on the operation mode
selected.
When auto operation mode is selected (PW0CF[PW0AUTO] = 1), it contains the low-
order byte of the programmed sine frequency (Fs).
When manual/timer operation mode is selected (PW0CF[PW0AUTO] = 0), it defines the
rate at which PWIR[PW0I] interrupt register bit will be asserted:
PWIR[PW0I] assertion rate = PP0 x (PW0VL + 1).
Lucent Technologies Inc.
101
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