PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 131

• Manufacturer Part Number: PC87393VJG
• Description: IC, SUPER I/O DEVICE, TQFP-100
• Manufacturer: National Semiconductor

Specifications of PC87393VJG

• Data Rate: 2Mbps
• Supply Voltage Range: 3V to 3.6V
• Logic Case Style: TQFP
• No. Of Pins: 100
• Operating Temperature Range: 0°C to +70°C
• Termination Type: SMD
• Transceiver Type: Interface
• Rohs Compliant: No

8.0 Legacy Functional Blocks
8.4 IR FUNCTIONALITY (SP2)
8.4.1
This section describes the IR support registers of Serial Port 2 (SP2). The UART support registers for both SP1 and SP2
are described in Section 8.3.
The IR functional block provides advanced, versatile serial communications features with IR capabilities.
SP2 supports also two DMA channels; the functional block can use either one or both of them. One channel is required for
IR-based applications, since IR communication works in half duplex fashion. Two channels would normally be needed to
handle high-speed full duplex UART based applications.
8.4.2
Eight register banks, each containing eight registers, control SP2 operation. Banks 0-3 are used to control both UART and
IR modes of operation; banks 4-7 are used to control and configure the IR modes of operation only. All registers use the
same 8-byte address space to indicate offsets 00h through 07h. The BSR register selects the active bank and is common
to all banks. See Figure 31.
General Description
IR Mode Register Bank Overview
Offset 07h
Offset 06h
Offset 05h
Offset 04h
Offset 02h
Offset 01h
Offset 00h
LCR/BSR
BANK 0
BANK 1
BANK 2
Figure 31. SP2 Register Bank Architecture
BANK 3
(Continued)
BANK 4
BANK 5
BANK 6
BANK 7
131
IR Special Banks
(Banks 4-7)
Common
Register
Throughout
All Banks
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