cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 364

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

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UART/IR Controller Register Descriptions
5.12.1.2
UART1 Secondary Dongle and Status (UART[1]_DONG)
MSR Address
Type
Reset Value
UART2 Secondary Dongle and Status (UART[2]_DONG)
MSR Address
Type
Reset Value
UART[x]_DONG is used for secondary identification of the dongle interface, and along with UART[x]_MOD, constitutes a
VDI (virtual dongle interface). The transceivers can also be configured for available mode by driving IRSL[2:0]. This support
is not provided in the current design, but the values of these signals are written in VDI UART[x]_MOD in case there is a
need to know what legacy software writes on IRSL[2:0] bits (via IRCFG1 at I/O Offset 04h in Bank 7). The MSR is readable
by the software so the status of IRSL[2:0] can be known.
Note: NCH: No Change; INV: Invert.
IRSL2
NCH
INV
INV
Bit
7:5
4:2
1
0
7
UART[x] Secondary Dongle and Status (UART[x]_DONG)
Name
RSVD
IRSL2-IRSL0
(RO)
ID3_SEC
ID0_SEC
IRSL1
INV
NCH
INV
51400039h
R/W
xxh
5140003Dh
R/W
xxh
RSVD
6
Description
Reserved. Write as 0.
IRSL[2:0] (Read Only). These bits are reflections of settings in the Transceiver Identifi-
cation and Control (IRIC) bits (Bank 7, I/O Offset 04h[2:0]). Software may read this field
to determine the settings of the virtual IR interface (dongle). See Section 5.12.10.5 "IR
Interface Configuration Register 1 (IRCFG1)" on page 398 for decode.
Secondary Dongle Control Signal. Secondary virtual dongle configuration bit. See
Table 5-30. Refer to Section 4.11.3 "Dongle Interface" on page 131 for additional informa-
tion.
Secondary Dongle Control Signal. Secondary virtual dongle configuration bit. See
Table 5-30. Refer to Section 4.11.3 "Dongle Interface" on page 131 for additional informa-
tion.
5
ID3
NCH: No support
INV: 36 kHz demodulation support
(RC-5 and RC-6 protocols)
NCH: No support
INV: 38 kHz demodulation support
(NEC protocol)
NCH: No support
INV: 56.9 kHz demodulation support
(RCA protocol)
Table 5-30. Secondary ID Encoding
UART[x]_DONG Bit Descriptions
UART[x]_DONG Register Map
IRSL2
4
364
(Continued)
IRSL1
3
ID0
Reserved
NCH: No support
INV: 40 kHz demodulation support
(JVC, Panasonic protocols)
Reserved
IRSL0
2
ID3_SEC
1
ID0_SEC
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