STPCE1HEBIE STMicroelectronics, STPCE1HEBIE Datasheet - Page 69

• Manufacturer Part Number: STPCE1HEBIE
• Manufacturer: STMicroelectronics

Specifications of STPCE1HEBIE

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Processing Unit: Microprocessor
• Operating Supply Voltage (min): 2.45/3V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 2.7/3.6V
• Package Type: BGA
• Screening Level: Industrial
• Pin Count: 388
• Mounting: Surface Mount
• Rad Hardened: No
• Lead Free Status / RoHS Status: Compliant

6.3.7. IDE / ISA DYNAMIC DEMULTIPLEXING
Some of the ISA bus signals are dynamically
multiplexed to optimize the pin count.
6.3.8. BASIC AUDIO USING IDE INTERFACE
When the application requires only basic audio
capabilities, an audio DAC on the IDE interface
can avoid using a PCI-based audio device. This
Note * : the inverter can be removed when the DAC CS# is directly connected to GND
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
DD[15:0]
PCS1
PDIOW#
PDRQ
SYSRSTO#
Speaker
STPC
STPC bus / DD[15:0]
16
Vcc
Figure 6-12. Typical IDE / ISA Demultiplexing
D
RST
Vcc
PR
MASTER#
ISAOE#
LA[22]
LA[23]
LA[24]
LA[25]
Figure 6-13. Basic audio on IDE
Q
Q
*
Figure 6-12
Release 1.3 - January 29, 2002
74xx74
DIR
OE
A
74xx245
D
RST
PR
Vcc
describes how to implement the external glue
logic to demultiplex the IDE and ISA interfaces. In
Local Bus mode the two buffers are not needed
and the NAND gates can be simplified to inverters.
low cost solution is not CPU consuming thanks to
the DMA controller implemented in the IDE
controller and can generate 16-bit stereo sound.
The clock speed is programmable when using the
speaker output.
B
Q
Q
D[15:0]
CS#
WR#
A/B
RMRTCCS#
KBCS#
RTCRW#
RTCDS
SA[19:8]
PCS1#
PCS3#
SCS1#
SCS3#
Stereo DAC
DESIGN GUIDELINES
Right
Left
Audio Out
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