DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 619

MCU 5V 128K I-TEMP,PB-FREE, 100-

DF2148RTE20IV

Manufacturer Part Number
DF2148RTE20IV
Description
MCU 5V 128K I-TEMP,PB-FREE, 100-
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Datasheets

Specifications of DF2148RTE20IV

Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
Host Interface, I²C, IrDA, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
74
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Section 17 Keyboard Buffer Controller
17.3.3
Receive Abort
The H8S/2148 Group and H8S/2147N device (system side) can forcibly abort transmission from
the device connected to it (keyboard side) in the event of a protocol error, etc. In this case, the
system holds the clock low. During reception, the keyboard also outputs a clock for
synchronization, and the clock is monitored when the keyboard output clock is high. If the clock is
low at this time, the keyboard judges that there is an abort request from the system, and data
transmission from the keyboard is aborted. Thus the system can abort reception by holding the
clock low for a certain period. A sample receive abort processing flowchart is shown in figure
17.7, and the receive abort timing in figure 17.8.
Rev. 4.00 Sep 27, 2006 page 573 of 1130
REJ09B0327-0400

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