DF2505BR26DV Renesas Electronics America, DF2505BR26DV Datasheet - Page 591

• Manufacturer Part Number: DF2505BR26DV
• Description: IC H8S/2505 MCU FLASH 176-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505BR26DV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(3)
In the IEBus, a 12-bit specific communications addresses are allocated to individual units. A
communications address is configured as follows.
• Upper four bits: group number (number identifying a group to which the unit belongs)
• Lower eight bits: unit number (number identifying individual units in a group)
(4)
In normal transfer, a single master unit communicates with a single slave unit. So, one-to-one
transfer or reception is performed. In broadcast communications, a single master unit
communicates with multiple slave units. Since there are multiple slave units, acknowledgement is
not returned from the slave units during communications.
A broadcast bit decides whether broadcast or normal communications is performed. (For details of
the broadcast bit, see section 17.1.2 (1) (b), Broadcast Bit.
There are two types of broadcast communications.
(a) Group broadcast communications
(b) General broadcast communications
17.1.2
Figure 17.2 shows an IEBus transfer signal format.
Communications data is transferred as a series of signals referred to as a communications frame.
The number of data which can be transmitted in a single communications frame and the transfer
speed differ according to communications mode.
Broadcast communications is performed to units with the same group number, meaning that
those units have the same upper four bits of the communications address.
Broadcast communications is performed to all units regardless of the group number.
Group broadcast and general broadcast communications are identified by a slave address. (For
details on the slave address, see section 17.1.2 (3), Slave Address Field.)
Communications Address
Broadcast Communications
Communications Protocol
Section 17 IEBus™ Controller (IEB) [H8S/2552 Group]
Rev. 6.00 Sep. 24, 2009 Page 543 of 928
REJ09B0099-0600