STPCI2GDYI STMicroelectronics, STPCI2GDYI Datasheet - Page 82

• Manufacturer Part Number: STPCI2GDYI
• Description: IC SYSTEM-ON-CHIP X86 516-PBGA
• Manufacturer: STMicroelectronics

Specifications of STPCI2GDYI

• Applications: Graphics Controller
• Core Processor: x86
• Controller Series: STPC® Atlas
• Interface: UART
• Number Of I /o: 16
• Voltage - Supply: 2.45 V ~ 2.7 V
• Operating Temperature: -40°C ~ 115°C
• Mounting Type: Surface Mount
• Package / Case: 516-PBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Program Memory Type: -
• Ram Size: -
• Lead Free Status / Rohs Status: Compliant

STPC® ATLAS
6.3.6. IPC
Most of the IPC signals are multiplexed: Interrupt
inputs, DMA Request inputs, DMA Acknowledge
outputs. The figure below describes a complete
implementation of the IRQ[15:0] time-multiplexing.
Figure 6-11. Typical IRQ multiplexing
When the interface is integrated into the STPC,
the corresponding interrupt line can be grounded
as it is connected internally.
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1
Timer 0
Keyboard
Slave PIC
COM2/COM4
COM1/COM3
LPT2
Floppy
LPT1
RTC
Mouse
FPU
PCI / IDE
PCI / IDE
ISA_CLK2X
ISA_CLK
IRQ[0]
IRQ[1]
IRQ[2]
IRQ[3]
IRQ[4]
IRQ[5]
IRQ[6]
IRQ[7]
IRQ[8]
IRQ[9]
IRQ[10]
IRQ[11]
IRQ[12]
IRQ[13]
IRQ[14]
IRQ[15]
Floppy
When an interrupt line is used internally, the
corresponding input can be grounded. In most of
the embedded designs, only few interrupts lines
are necessary and the glue logic can be simplified.
For example, if the integrated IDE controller is
activated, the IRQ[14] and IRQ[15] inputs can be
grounded.
1C0
1C1
1C2
1C3
2C0
2C1
2C2
2C3
A
B
1C0
1C1
1C2
1C3
2C0
2C1
2C2
2C3
A
B
74x153
74x153
1G
1G
2G
2G
1Y
2Y
1Y
2Y
IRQ_MUX[0]
IRQ_MUX[1]
IRQ_MUX[2]
IRQ_MUX[3]