PC87108AVJE NSC [National Semiconductor], PC87108AVJE Datasheet - Page 4

• Manufacturer Part Number: PC87108AVJE
• Description: Advanced UART and Infrared Controller
• Manufacturer: NSC [National Semiconductor]

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SUPPLIES
V
V
BUS INTERFACE SIGNALS
A0–A15
AEN/CS
D7–D0
1.0 Pin Description
DD
SS
Symbol
1, 21, 41,
61, 71
11, 20, 33,
40, 46, 49,
60, 70, 80
19–12,
10–3
2
59–52
Pin(s)
Type
I/O
I
I
FIGURE 1. 80-Pin PQFP or TQFP Package
5V or 3.3V Power Supply.
Ground.
Address. Input signals used to determine which internal register is accessed. In
the chip select accessing mode, only A0–A3 are used (Section 4.2). A0–A15
are ignored during a DMA access.
Address Enable or Chip Select. Dual function pin. The pin function is selected
by the levels of BADDR[0–1] during reset (Section 4.2). AEN is used to disable
the internal address decoder when it is high. CS is used in conjunction with
A0–A3 to select the internal registers.
Data Bus. 8-bit bi-directional data lines used to transfer data between the
PC87108A and the CPU or DMA controller. D0 is the LSB and D7 is the MSB.
CONNECTION DIAGRAM
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4
Description
DS012549-3