TDA19989 NXP Semiconductors, TDA19989 Datasheet - Page 23

• Manufacturer Part Number: TDA19989
• Description: 150 MHz pixel rate HDMI 1.3 transmitter
• Manufacturer: NXP Semiconductors

www.DataSheet.in
NXP Semiconductors
TDA19989_1
Preliminary data sheet
7.10.1 Hot plug/unplug detect
7.10.2 Receiver sensitivity
7.10 Interrupt controller
Pin INT is used to alert the system microcontroller that a critical event concerning the
HDMI or CEC has occurred. The software provided with the device read a status register
(I
before processing it. Some of theses interrupts are maskable. The interrupt types are
described in
Table 18.
The hot plug detect (HPD) pin is 5 V input tolerant. The HPD signal, when asserted, tells
the transmitter that the receiver is connected. When changing from LOW-to-HIGH,
TDA19989 has to read the EDID of the receiver in order to select the video format that the
receiver can handle.
TDA19989 has the capability to sense the receiver connectivity and working behavior.
This feature (RxSense) detects the presence of the 50 Ω pull-up resistor R
clock channel of the downstream side.
Interrupt domain
HDCP
HPD
RxSense
Interrupt
EDID
CEC
2
C-bus) to determine which block between HDMI and CEC has caused the interruption
Interruptions
Table
18.
Rev. 01 — 15 February 2010
Interrupt name
r0
pj
sha-1
bstatus
bcaps
t0
security
hpd
rx_sense
sw_intsoftware
edid_block_rd
cec_int
HDMI 1.3 transmitter with HDCP and CEC support
transition on RxSense
Definition
r0 = R’0 check done
pj = P’j check fails
V = V’ check success
bstatus available
bcaps available
HDCP goes to initial
state
HDCP encryption is off
or blue screen removed
transition on HPD input
test purpose (output an
interrupt signal)
EDID block read finished maskable
CEC message received
TDA19989
Maskable feature
maskable
not maskable
maskable
maskable
maskable
not maskable
© NXP B.V. 2010. All rights reserved.
T
on the TMDS
23 of 47