SIO1007 datasheet(33/108 Pages) MICROCHIP

部件名	SIO1007

功能描述	LPC Super I/O LPC IrDA Hot Docking Chip with UART

PDF	108 Pages

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制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

标志

33 / 108 page

 2005 - 2015 Microchip Technology Inc.

DS00002020A-page 33

SIO1007

9.7

Logical Device IRQ and DMA Operation

Any time the IRQ or DMA channel for a UART logical block is disabled by a register bit in that logical block, the IRQ

and/or DMA channel is disabled. This is in addition to the IRQ and DMA channel disabled by the Configuration Registers

(active bit or address not valid).

The Modem Control Register (MCR) Bit D2 (OUT2) - When OUT2 is a logic "0", the serial port interrupts disabled.

Disabling DMA Enable bit, disables DMA for UART2. Refer to the IrCC specification.

9.8

Output Pin States

The TXD1, nRTS1 & nDTR1 pin states change prior to intialization depending on VCC POR, and the state of the UART1

Power bit (bit[3] in CR02 on page 61).

TABLE 9-6:

OUTPUT PIN STATES

Power

CR02 Bit[3]

VCC POR

State of TXD1, nRTS1 & nDTR1 Pins

0 Default

Active edge

Tristate

After POR

Tristate

1HIGH

SIO1007 数据表(PDF) 33 Page - Microchip Technology