Interrupt Interface; Serial Communication/Interrupt Registers - Semtech SH3000 User Manual

7.2 Interrupt Interface

The serial communications line to the SH3000 (Pin 14, IO/I
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 CLK
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. See the Periodic Interrupt/Wake-up Timer chapter in this manual.

7.3 Serial Communication/Interrupt Registers

NAME
0x0E
Config
NAME
0x11
0 IPol_RCtune
SH3000UM version 0.95
Copyright ©2002 Semtech Corporation
RESET RESET
EVENT VALUE
P 1 b7 XTALtune Rewrite-Once Enable (see notes for use)
P W B 0 b6 Register Page for R0x10 through R0x17. 0 =Page0, 1 =Page1.
P W B 0 b5 ForceDCOon. Forces HF Oscillator to run under all conditions.
P W B 0 b4 CLK
0x88
P W B
1 b3 CLK
P W B 0 b2 WdogClkSelect. 1 = CLK
P W B 0 b1 Interrupt Flag Clear. 1 = clear, 0 = no effect, always reads 0.
P W B 0 b0 Interrupt Enable. 1 = enable, 0 = disable.
INIT INIT WRITE
EVENT VALUE PROTECT
-0-
P W B ?
P W B
?
P W B ?
0x??
P W B ?
P W B
?
P W B ?
P W B ?
2002-08
) also serves as the interrupt to the host
NT
DESCRIPTION
source. 1 = 32 kHz, 0 = HFCLK.
OUT
Enable. 1 = enable, 0 = disable.
OUT
, 0 = 32 kHz.
OUT
b7 Reserved, not used
A b6 Interrupt Polarity, 1 = High, 0 = Low.
C
b5
C b4
32 kHz RC Oscillator Adjustment,
C b3
nominal ~330 Hz per step.
C
b2
C b1
C b0
SH3000 User Manual
Preliminary
, and then returns
OUT
DESCRIPTION
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