604-00050 Parallax Inc, 604-00050 Datasheet - Page 8

• Manufacturer Part Number: 604-00050
• Description: IC FLOATING-PT COPROC V3 18-DIP
• Manufacturer: Parallax Inc

Specifications of 604-00050

• Processor Type: Floating-Point Co-Processor
• Voltage: 2.7V ~ 5.5V
• Mounting Type: Through Hole
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Speed: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

I
If the CS pin is a logic high at reset (e.g. tied to VDD), the uM-FPU will be configured as an I
an I
shown below.
I
The slave address is 7 bits long, followed by an 8th bit which specifies whether the master wishes to write to the
slave (0), or read from the slave(1). The default slave address for the uM-FPU is 1100100x (binary).
The slave address can be changed using the built-in serial debug monitor and stored in nonvolatile flash memory.
I
The uM-FPU can handle I
I
The following diagrams show the write and read data transfers. A write transfer consists of a slave address, followed
by a register address, followed by 0 to n data bytes. A read transfer is normally preceded by a write transfer to select
the register to read from.
Micromega Corporation
2
2
2
2
C Slave Address
C Bus Speed
C Data Transfers
C interface
2
•
•
C interface allows the uM-FPU to share the I
expressed as a 7-bit value, the default slave address is 100 (decimal), or 0x64 (hex).
expressed as a left justified 8-bit value the default slave address is 200 (decimal) or 0xC8 (hex).
S 1100100
S - Start Condition
A - ACK/NAK
P - Stop Condition
Microcontroller Pins
Note: SCL and SDA
must have pull-up
resistors as required
by the I2C bus.
P0 (default) SCL
P1 (default) SDA
Address
Slave
2
C data speeds up to 400 kHz.
0 A
aaaaaaaa
Register
Address
I
VDD
2
C Write Data Transfer
I
2
2
C bus with other peripheral chips. The connection diagram is
C Connection
1
2
3
4
5
6
7
8
9
8
/MCLR
AN0
AN1
CS
EXTIN
OSC1
OSC2
SEROUT
SERIN
A
uM-FPU V3
dddddddd
Data
SOUT/SCL
SIN/SDA
AVDD
SCLK
OUT0
OUT1
AVSS
VDD
0 to n data bytes
VSS
18
17
16
15
14
13
12
10
11
A
4.7K
dddddddd
VDD
Connecting to the uM-FPU V3.1
Data
VDD
uM-FPU V3.1 Datasheet
4.7K
A
2
C slave device. Using
P