CS5535 Datasheet, PDF (364/555 Pages) National Semiconductor (TI) – Geode™ CS5535 I/O Companion Multi-Function South Bridge

UART/IR Controller Register Descriptions (Continued)
5.12.1.2 UART[x] Secondary Dongle and Status (UART[x]_DONG)
UART1 Secondary Dongle and Status (UART[1]_DONG)
MSR Address
51400039h
Type
R/W
Reset Value
xxh
UART2 Secondary Dongle and Status (UART[2]_DONG)
MSR Address
5140003Dh
Type
R/W
Reset Value
xxh
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.
UART[x]_DONG Register Map
7
6
5
4
3
2
1
0
RSVD
IRSL2
IRSL1
IRSL0
ID3_SEC
ID0_SEC
Bit Name
7:5 RSVD
4:2 IRSL2-IRSL0
(RO)
1
ID3_SEC
0
ID0_SEC
UART[x]_DONG Bit Descriptions
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.
Table 5-30. Secondary ID Encoding
IRSL2
IRSL1
ID3
ID0
NCH
INV
NCH: No support
INV: 36 kHz demodulation support
(RC-5 and RC-6 protocols)
Reserved
INV
NCH
NCH: No support
NCH: No support
INV: 38 kHz demodulation support
INV: 40 kHz demodulation support
(NEC protocol)
(JVC, Panasonic protocols)
INV
INV
NCH: No support
INV: 56.9 kHz demodulation support
(RCA protocol)
Note: NCH: No Change; INV: Invert.
Reserved
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