tea5761uk NXP Semiconductors, tea5761uk Datasheet - Page 17

• Manufacturer Part Number: tea5761uk
• Description: Tea5761uk Low-voltage Single Chip Fm-stereo Radio
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 13451
Product data sheet
9.2.4 Frequency ready flag
9.2.5 Band limit flag
9.3 Interrupt output
Bit LEVFLAG is cleared when the interrupt register INTFLAG is read.
The frequency ready flag bit FRRFLAG is set to logic 1 when the automatic tuning has
finished a search or preset. The description of this bit is given in
cleared when the INTMSK register is read.
The band limit bit BLFLAG is set to logic 1 when the automatic tuning has detected the
end of the tuning band or when the PLL cannot lock on a certain frequency. This bit is
described in
The interrupt line driver is a MOS transistor with a nominal sink current of 380 A. It is
pulled HIGH by an 18 k resistor connected to pin VREFDIG. The interrupt line can be
connected to one other similar device with an interrupt output and an 18 k pull-up
resistor providing a wired-OR function. This allows any of the drivers to pull the interrupt
line LOW by sinking the current. When a flag is set and not masked it generates an
interrupt; see
Fig 6. Interrupt line behavior
V
flag
INTX
read INTMSK
write
INTMSK
CCA
(1) When flag is set, the next interrupts are blocked until INTMSK is read from or written to.
(2) Reading INTMSK clears flag, INTMSK and INTX.
(3) Writing INTMSK enables INTX.
(1)
(3)
(2)
Table
Figure
5. This bit is cleared when the INTMSK register is read.
6.
10 ms
Rev. 01 — 2 August 2006
read clears INTX
10 ms
Low voltage single-chip FM stereo radio
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
10 ms
TEA5761UK
Table
5. This bit is
10 ms
001aab489
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