SH3000UM SEMTECH [Semtech Corporation], SH3000UM Datasheet - Page 21

• Manufacturer Part Number: SH3000UM
• Manufacturer: SEMTECH [Semtech Corporation]

Interrupt and Serial Interface
Interrupt Interface
The serial communications line to the SH3003 (Pin 14, IO/Int) also serves as the interrupt to the host microcontroller.
The polarity of the interrupt is software programmable using the interrupt polarity bit (bit 6) of the IPol_RCtune register
(R0x11). This pin is asserted for four cycles of CLKout, and then returns to the inactive state.
The interrupt line is used by the Periodic Interrupt/Wake-up Timer to interrupt the host when it reaches its end of
count.
©2006 Semtech Corp.
POWER MANAGEMENT
POWER MANAGEMENT
Application Information
CLK
OUT
16MHz
8MHz
2MHz
Frequency
(host synchronous to CLK
(continued)
(continued)
Minimum Bit Period
Table 3 - Minimum/Maximum Serial Bit Timing
250ns
500ns
2μs
OUT
21
)
(host Asynchronous to
Minimum Bit Period
CLK
3.25μs
6.5μs
26μs
OUT
)
Maximum Bit Period
63.9μs
127μs
511μs
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SH3003