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SIO1007 Folha de dados(PDF) 74 Page - Microchip Technology

Nome de Peças SIO1007
Descrição Electrónicos  LPC Super I/O LPC IrDA Hot Docking Chip with UART
PDF  108 Pages
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Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

SIO1007 Folha de dados(HTML) 74 Page - Microchip Technology

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SIO1007
DS00002020A-page 74
 2005 - 2015 Microchip Technology Inc.
18.4.36
CR25
CR25 can only be accessed in the configuration state and after the CSR has been initialized to 25H. CR25 is used to
select the base address of Serial Port 2 (UART2). Serial Port 2 can be set to 96 locations on 8-byte boundaries from
100H - 3F8H. To disable Serial Port 2, set ADR9 and ADR8 to zero. Set CR25.0 to 0 when writing the UART2 Base
Address.
Serial Port 2 Address Decoding: address bits A[15:10] must be ‘000000’ to access UART2 registers. A[2:0] are decoded
as XXXb.
18.4.37
CR26
Register CR26 is reserved. The default value of this register after power up is 00H.
18.4.38
CR27
Register CR27 is reserved. The default value of this register after power up is 00H.
18.4.39
CR28
CR28 can only be accessed in the configuration state and after the CSR has been initialized to 28H. CR28 is used to
select the IRQ for Serial Port 1 (bits 7 - 4) and for Serial Port 2 (bits 3 - 0). The four bit IRQ encoding field is defined in
Table 18-32, "IRQ Encoding". Any unselected IRQ output (registers CR28 - CR2A) is in tristate. Shared IRQs are not
supported in the SIO1007.
TABLE 18-30: CR25
UART2 Base Address Register
Type: R/W
Default: 0X00 ON VCC POR
BIT NO.
BIT NAME
DESCRIPTION
0
Reserved
Read Only. A read returns 0.
1
ADR3
Serial Port 2 Base Address bits for decoder.
2
ADR4
3
ADR5
4
ADR6
5
ADR7
6
ADR8
7
ADR9
TABLE 18-31: CR28
UART Interrupt Selection
Type: R/W
Default: 0X00 ON VCC POR
BIT NO.
BIT NAME
DESCRIPTION
3:0
UART2 IRQ Select
These bits are used to select IRQ for Serial Port 2. See Table 18-32.
7:4
UART1 IRQ Select
These bits are used to select IRQ for Serial Port 1. See Table 18-32.
TABLE 18-32: IRQ ENCODING
Bits [3:0] Or Bits [7:4]
IRQ Selected
0000
NONE
0001
IRQ_1
0010
IRQ_2
0011
IRQ_3
0100
IRQ_4
0101
IRQ_5



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