SSC050-01 Datasheet, PDF (17/79 Pages) Maxim Integrated Products – Two-Wire Serial Backplane Controller

Control Registers
Register Map
Chapter 4 CONTROL REGISTERS
SSC050-01
Data Sheet
This section contains descriptions for the device-specific control registers. All register locations are
fixed within the device and are mapped for easy access as well as future enhancements.
The control register section is separated into three sub-sections; a register map, an address map and the
bit level description of all registers. The register map lists all registers by operating address. The address
map shows the relative layout of all control registers. All registers can be accessed at any time and no
register function will interfere with the operation of the serial interface. However, changing register bits
will have an immediate effect on the respective I/O lines.
REGISTER MAP
Table 4-1: Register Map
Data Memory
Address
00h
01h
02h
03h
04h
10h
11h
12h
13h
14h
20h
21h
22h
23h
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Label
Description
GPD0
GPD1
GPD2
GPD3
GPD4
DDP0
DDP1
DDP2
DDP3
DDP4
PBC0
PBC1
PBC2
PBC3
General Purpose I/O Port 0 Data Register
General Purpose I/O Port 1 Data Register
General Purpose I/O Port 2 Data Register
General Purpose I/O Port 3 Data Register
General Purpose I/O Port 4 Data Register
I/O Port 0 Data Direction Register
I/O Port 1 Data Direction Register
I/O Port 2 Data Direction Register
I/O Port 3 Data Direction Register
I/O Port 4 Data Direction Register
Port Bypass Control 0 Register
Port Bypass Control 1 Register
Port Bypass Control 2 Register
Port Bypass Control 3 Register
4-1
Revision 4.0
November 10, 2004