CS5535 datasheet(364/555 Pages) NSC

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364

Revision 0.8

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)

UART2 Secondary Dongle and Status (UART[2]_DONG)

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.

MSR Address

51400039h

Type

R/W

Reset Value

xxh

MSR Address

5140003Dh

Type

R/W

Reset Value

xxh

UART[x]_DONG Register Map

RSVD

IRSL2

IRSL1

IRSL0

ID3_SEC

ID0_SEC

UART[x]_DONG Bit Descriptions

Bit

Name

Description

7:5

RSVD

Reserved. Write as 0.

4:2

IRSL2-IRSL0

(RO)

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.

ID3_SEC

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.

ID0_SEC

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

INV: 38 kHz demodulation support

(NEC protocol)

NCH: No support

INV: 40 kHz demodulation support

(JVC, Panasonic protocols)

INV

NCH: No support

INV: 56.9 kHz demodulation support

(RCA protocol)

Reserved

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