N681622YG Nuvoton Technology Corporation of America, N681622YG Datasheet - Page 38

• Manufacturer Part Number: N681622YG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of N681622YG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Each tone generator contains two timers, one for setting the active period and the other for the inactive period. Each
period can be programmed between 0 seconds (timer disabled) to 8 seconds in 125µs increments. In addition,
interrupts can be enabled on the expiration of either timer. The device has programmable cadence where the signal
is generated during the active period and suspended during the inactive period.
One-shot control of the oscillation can be achieved by controlling OSN:O1E[0] and OSN:O2E[1] address (0xC0)
together with the active timer and the interrupt for durations up to 8 seconds. For longer durations or for direct
software control of the oscillation, enabling the active timer by setting it to any non-zero value while simultaneously
disabling the inactive timer completely will put the oscillator under direct control of the OSN:OmE bit. Zero crossing
detect can be enabled by setting the OSN:OmZC bit for the corresponding tone generator. Setting this bit will ensure
that each oscillator pulse will end without a DC component as illustrated below.
Preliminary Datasheet Rev1.0
IE2:O1AE
IE2:O1AE
IE2:O1E
IE2:O1E
INT2:O1A
INT2:O1A
INT Logic
INT Logic
OS1AT
OS1AT
OS1C
OS1C
INT2:O1I
INT2:O1I
Figure 8: Block Diagram Oscillator 1
INT Logic
INT Logic
OS1IT
OS1IT
RMPC:TR
RMPC:TR
OS1IC
OS1IC
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To TX Path
To TX Path
Load Logic
Load Logic
IT
IT
Expire
Expire
Register
Register
Single Programmable Extended Codec/SLCC
Load
Load
Counter
Counter
Resonance
Resonance
Modulo
Modulo
16-Bit
16-Bit
Two-pole
Two-pole
Oscillator
Oscillator
Routing
Routing
Signal
Signal
Zero Cross
Zero Cross
AT
AT
Expire
Expire
Logic
Logic
To RX Path
To RX Path
Enable
Enable
O1EN
O1EN
OSNC:O1ZC
OSNC:O1ZC
Zero
Zero
Cross
Cross
8 kHz Clock
8 kHz Clock
8 kHz Clock
8 kHz Clock
N681386/87
OSC1S
OSC1S
January 2010