SC18IS601 Philips Semiconductors, SC18IS601 Datasheet - Page 5

• Manufacturer Part Number: SC18IS601
• Description: (SC18IS600 / SC18IS601) SPI to IC-bus interface
• Manufacturer: Philips Semiconductors

NXP Semiconductors
6. Functional description
Table 3.
[1]
[2]
SC18IS600_601_3
Product data sheet
Register
address
0x00
0x01
0x02
0x03
0x04
0x05
For SC18IS601, these bits are ‘Don’t care’.
For SC18IS601 GPIO3 is not used.
Register
IOConfig
IOState
I2CClock
I2CTO
I2CStat
I2CAdr
Internal registers summary
6.2.1 Programmable IO port configuration register (IOConfig)
6.1 Internal registers
6.2 Register descriptions
Bit 7
IO3.1
0
CR7
TO6
1
ADR7
The SC18IS600/601 acts as a bridge between a SPI interface and an I
SPI master device to communicate with I
Mode 3 of the SPI specification and can operate up to 3 Mbit/s (SC18IS601).
The SC18IS600/601 provides internal registers for monitoring and control. These
registers are shown in
paragraphs.
Pins GPIO0 to GPIO3 may be configured by software to one of four types. These are:
quasi-bidirectional, push-pull, open-drain, and input-only. Two configuration bits per pin,
located in the IOConfig register, select the IO type for each pin. Each pin has
Schmitt-triggered input that also has a glitch suppression circuit. IO4 and IO5 are
quasi-bidirectional pins and are not user-configurable. For SC18IS601, GPIO3 is
non-existent.
Table 4
correspond to GPIOx.
Table 4.
IOx.1
0
0
1
1
[1]
Bit 6
IO3.0
0
CR6
TO5
1
ADR6
shows the configurations for the programmable I/O pins. IOx.1 and IOx.0
Pin configurations
[1]
IOx.0
0
1
0
1
Bit 5
IO2.1
GPIO5
CR5
TO4
1
ADR5
Rev. 03 — 13 December 2006
Table
Pin configuration
quasi-bidirectional output configuration
input-only configuration
push-pull output configuration
open-drain output configuration
Bit 4
IO2.0
GPIO4
CR4
TO3
1
ADR4
3. Register functions are more fully described in the following
Bit 3
IO1.1
GPIO3
CR3
TO2
I2CSTAT3 I2CSTAT2 I2CSTAT1 I2CSTAT0 R
ADR3
[2]
2
C-bus slave devices. The SPI interface supports
Bit 2
IO1.0
GPIO2
CR2
TO1
ADR2
Bit 1
IO0.1
GPIO1
CR1
TO0
ADR1
SC18IS600/601
SPI to I
Bit 0
IO0.0
GPIO0
CR0
TE
X
2
© NXP B.V. 2006. All rights reserved.
C-bus. It allows a
2
C-bus interface
R/W
R/W
R/W
R/W
R/W
R/W
Default
value
0x00
0x3F
0x19
0xFE
0xF0
0x00
5 of 28