wm9715l Wolfson Microelectronics plc, wm9715l Datasheet - Page 52

• Manufacturer Part Number: wm9715l
• Description: Ac?97 Audio And Touchpanel Codec
• Manufacturer: Wolfson Microelectronics plc

WM9715L
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Figure 15 Interrupt Logic Equivalent Circuit
transmitted through the GENIRQ pin if the dedicated interrupt pins cannot be used (e.g. if there are
insufficient pins available on the host processor).
The GENIRQ output is enabled using registers 56h and 4Ch. Its polarity can be controlled using the
IRQINV bit in register 58h, and interrupt wake-up (i.e. re-activating the AC-Link when an interrupt
occurs after the WM9715L has been put into sleep mode, see “Power Management”) is enabled by
the WAKEEN bit in register 58h.
Table 36 Controlling the GENIRQ pin
The global interrupt signal GENIRQ is a logical OR of selected internal interrupts, each of which may
have its polarity inverted and/or go through a “sticky” circuit if desired. This is illustrated below.
Each GENIRQ interrupt source has an associated bit in register 54h for readback.
Table 37 Interrupt Sources
Thermal Cutout (T)
4Ch
56h
58h
Additional
Functional
Control
REGISTER
ADDRESS
AUXADC Data
Pen-down (P)
COMP2 (C2)
COMP1 (C1)
Available (A)
INTERRUPT
SOURCE
2
2
0
1
BIT
REG 54H
GC2
GE2
IRQINV
WAKE
EN
LABEL
BIT
11
12
13
14
15
1
1
0
0
Internal thermal cutout signal, indicates when internal
temperature reaches approximately 150°C (see “Thermal
Sensor”)
Internal ADA (ADC Data Available) Signal
enabled only when auxiliary ADC is active
Internal PENDOWN Signal
enabled only when pen-down detection is active
Internal COMP2 output (Low Battery Alarm)
enabled only when COMP2 is on
Internal COMP1 output (Dead Battery Alarm)
enabled only when COMP1 is on
DEFAULT
GENIRQ output enable
GENIRQ is enabled when both GC4 and GE4 are
To disable GENIRQ, set both bits to ‘1’.
Other combinations (0/1, 1/0) are reserved.
Inverts the GENIRQ signal (pin 45)
0: GENIRQ signal not inverted
1: GENIRQ signal inverted
Enables WM9715L wake-up on interrupt
0: Disabled
1: Enabled
set to ‘0’.
DESCRIPTION
DESCRIPTION
PD Rev 4.0 December 2007
Production Data
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