PNX1702EH/G,557 NXP Semiconductors, PNX1702EH/G,557 Datasheet - Page 170
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PNX1702EH/G,557
Manufacturer Part Number
PNX1702EH/G,557
Description
IC MEDIA PROC 500MHZ 456-BGA
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1702EHG557.pdf
(832 pages)
Specifications of PNX1702EH/G,557
Applications
Multimedia
Core Processor
TriMedia
Controller Series
Nexperia
Ram Size
208K x 8
Interface
I²C, 2-Wire Serial
Number Of I /o
61
Voltage - Supply
1.33 V ~ 1.47 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
456-HBGA
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Program Memory Type
-
Lead Free Status / Rohs Status
Compliant
Other names
935281647557
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
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Philips Semiconductors
Volume 1 of 1
PNX17XX_SER_1
Preliminary data sheet
Figure 6:
(external clock)
Clock Detection Circuit
2.10 VDO Clocks
en
counter
Toggle
Flop
Clock detection is done based on a 5-bit counter running at the crystal clock
frequency. The implementation detects clocks between 1 MHz and 200 MHz. It will
take up to 2 s from when the clock is removed until the interrupt condition is
generated. A block diagram of the clock detection circuit is shown in
An interrupt is generated whenever the signal 'clock present' changes status.
Therefore an interrupt is generated if a clock changes from 'present' to 'non-present’
OR from 'non-present to 'present'. The interrupt registers are implemented using the
standard peripheral interrupt module and can thus be enabled/cleared/set by
software.
In the PNX17xx Series all of the above clocks can also be generated internally. In this
case the clock detection circuit can still be enabled. If the internal source is changed
then the clock detection circuit will detect the period of time that there is not a clock.
At this time the logic updates the interrupt status register and asserts an interrupt if
the interrupt is enabled. The interrupts are by default disabled and should remain that
way as long as the clock is generated internally. If in the course of time the output
clock is changed to an input the interrupt status register needs to be cleared before
the interrupts are enabled.
The two VDO out clocks, VDO_CLK1 and VDO_CLK2, have several operating
modes. A brief explanation of these modes is included in this section. Each clock has
three possible modes, input, separate output, and feedback mode. In input mode an
external clock is driving these clocks (hence driving QVCP/LCD and FGPO). In
separate output mode the clock module drives both the clocks going to the IP (QVCP/
LCD and FGPO) and to its related output clock VDO_CLK1 and VDO_CLK2. In this
case the source of the clock is the same, but the paths are totally separate. The third
mode is feedback mode. In feedback mode the clock module drives the output clock,
VDO_CLK1 and VDO_CLK2. This clock is then feedback through the pad to the clock
module. Then it goes on to the IP (QVCP/LCD and FGPO). Diagrams of these clocks
can be found in
To select between output and input mode a bit is provided in each of the configuration
registers for qvcp and fgpo. Writing to the qvcp_output_enable bit will change the
direction of the qvcp clock. Writing to the fgpo_output_enable bit will change the
xtal_clk
32
xtal_clk
Figure 17 on page 5-29
en
Rev. 1 — 17 March 2006
xtal_clk
comp
clock_present
and
Figure 18 on page
detect
edge
Chapter 5: The Clock Module
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
pls2lvl
PNX17xx Series
5-29.
PIO
INT
Figure
intrpt_clk
6.
5-19
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