OM6272,598 NXP Semiconductors, OM6272,598 Datasheet - Page 5

• Manufacturer Part Number: OM6272,598
• Description: DEMO BOARD UART TO I2C
• Manufacturer: NXP Semiconductors

Specifications of OM6272,598

• Main Purpose: Interface, I2C Master to UART
• Embedded: No
• Utilized Ic / Part: SC18IM700
• Primary Attributes: UART to I2C Master/GPIO Bridge, 4-Bit LED Dimmer
• Secondary Attributes: Graphic User Interface
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 568-3512; 935282853598; OM6272

Philips Semiconductors
3. SC18IM700: UART to I
4. Using the SC18IM700 to control the PCA9531
AN10397_1
Application note
The SC18IM700 is designed to serve as an interface between a standard UART of a
microcontroller/microprocessor and the serial I
microcontroller/microprocessor to communicate directly with other I
SC18IM700 can operate as an I
SC18IM700 controls all the I
The host communicates with the SC18IM700 with ASCII messages protocol; this makes
the control sequences from host to SC18IM700 become very simple.
The host initiates I
registers through a series of ASCII commands. Table 2 lists the ASCII commands
supported by SC18IM700, and also their hex value representation. Unrecognized
commands are ignored by the device.
Table 2:
Please refer to the SC18IM700 data sheet for more descriptive detail of the above
commands.
The ‘S’ command can be used to setup the PCA9531’s internal registers to blink the LED
at specified frequency and rate. The format for the ‘S’ command is shown in
ASCII command
S
P
R
W
I
O
Z
Fig 1. SC18IM700 controlling the PCA9531
Fig 2. ‘S’ command format
ASCII commands supported by the SC18IM700
S CHAR.
HOST
2
C-bus controller
UART
2
C-bus data transfer, read from and write to SC18IM700 internal
Hex value
0x53
0x50
0x52
0x57
0x49
0x4F
0x5A
Rev. 01 — 5 December 2005
SLAVE ADR.
+ W
TX
RX
2
How to use the SC18IM700 to control any I
C-bus specific sequences, protocol, arbitration and timing.
2
C-bus master and can be a transmitter or a receiver. The
OF BYTES
Command function
I
I
read SC18IM700 internal register command
write to SC18IM700 internal register command
read GPIO port command
write to GPIO port command
power-down
NUMBER
2
2
UART
C-bus START command
C-bus STOP command
SC18IM700
2
DATA 0
MASTER
C-bus. This allows the
I
2
C-BUS
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
SDA
SCL
DATA N
2
C-bus devices. The
PCA9531
P CHAR.
AN10397
002aab967
2
C-bus device
Figure
2.
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