
SAA8200HL_2
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Preliminary data sheet
Rev. 02 — 17 October 2005
33 of 71
Philips Semiconductors
SAA8200HL
Ensation Base integrated wireless audio baseband
7.16 VPB1 bridge
This section describes the interfaces and function of the VPB1 bridge. The VPB1 bridge
acts as a bridge between the UART and the EPICS7B DIO interface. Two bridges are
used; one to connect to several slow blocks and an additional one specifically for the
universal synchronous receiver transmitter, which is commonly used to implement a serial
interface. In any case where a device needs a low overhead, standard, low performance
interface, a UART can be used. The UART includes advanced features like a fractional
clock divider.
7.17 UART configuration
The UART interface is used to be implemented as a serial interface to, for example a
modem and is compatible with the industry standards 16650 UARTs.
No full modem interface is included, only the CTS and RTS modem signals are available.
The UART interface can also be configured as an IrDA (InfraRed Digital Association) SIR
(Serial InfraRed) interface, which has a pulse and polarity compliancy with the IrDA
Version 1.0 Physical Layer Specification.
Table 13:
MODE[1:0]
00
01
10
11
Mode settings
Pin multiplexer mode
GPIO; high-impedance
normal operation; controlled by subsystem
GPIO drive LOW
GPIO drive HIGH
Table 14:
Base address Offset
0x0000
VPB1 bridge interface description
Key
Description
UART
receive FIFO
transmit FIFO
interrupt enable register
interrupt ID register
FIFO control register
line control register
modem control register
line status register
modem status register
scratch pad register
divisor latch LSB
divisor latch MSB
fractional divider register
0x0000
0x0000
0x0004
0x0008
0x0008
0x000C
0x0010
0x0014
0x0018
0x001C
0x0000
0x0004
0x0028
UART_RBR
UART_THR
UART_IER
UART_IIR
UART_FCR
UART_LCR
UART_MCR
UART_LSR
UART_MSR
UART_SCR
UART_DLL
UART_DLM
UART_FDR