DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 529
DF2357F20
Manufacturer Part Number
DF2357F20
Description
IC H8S MCU FLASH 5V 128K 128QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Datasheet
1.D12392F20V.pdf
(1049 pages)
Specifications of DF2357F20
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
87
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Quantity
Price
Company:
Part Number:
DF2357F20
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Part Number:
DF2357F20IV
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14.3.3
The multiprocessor communication function performs serial communication using the multiprocessor format, in which a
multiprocessor bit is added to the transfer data, in asynchronous mode. Use of this function enables data transfer to be
performed among a number of processors sharing transmission lines.
When multiprocessor communication is carried out, each receiving station is addressed by a unique ID code.
The serial communication cycle consists of two component cycles: an ID transmission cycle which specifies the receiving
station , and a data transmission cycle. The multiprocessor bit is used to differentiate between the ID transmission cycle
and the data transmission cycle.
The transmitting station first sends the ID of the receiving station with which it wants to perform serial communication as
data with a 1 multiprocessor bit added. It then sends transmit data as data with a 0 multiprocessor bit added.
The receiving station skips the data until data with a 1 multiprocessor bit is sent.
When data with a 1 multiprocessor bit is received, the receiving station compares that data with its own ID. The station
whose ID matches then receives the data sent next. Stations whose ID does not match continue to skip the data until data
with a 1 multiprocessor bit is again received. In this way, data communication is carried out among a number of
processors.
Figure 14-9 shows an example of inter-processor communication using the multiprocessor format.
Data Transfer Format: There are four data transfer formats.
When the multiprocessor format is specified, the parity bit specification is invalid.
For details, see table 14-10.
Clock: See the section on asynchronous mode.
Multiprocessor Communication Function
Figure 14-9 Example of Inter-Processor Communication Using Multiprocessor Format
Serial
data
Legend:
MPB: Multiprocessor bit
Transmitting
Receiving
station A
(ID= 01)
station
(Transmission of Data H'AA to Receiving Station A)
ID transmission cycle=
specification
receiving station
H'01
Receiving
station B
(ID= 02)
(MPB= 1)
Serial transmission line
Data transmission cycle=
Data transmission to
receiving station specified by ID
Receiving
H'AA
station C
(ID= 03)
(MPB= 0)
Rev.6.00 Oct.28.2004 page 499 of 1016
Receiving
station D
(ID= 04)
REJ09B0138-0600H
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