DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 621
DF2148RTE20IV
Manufacturer Part Number
DF2148RTE20IV
Description
MCU 5V 128K I-TEMP,PB-FREE, 100-
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
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
-
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KCLK
(pin state)
KD
(pin state)
KCLK
(input)
KCLK
(output)
KD
(input)
KD
(output)
Figure 17.8 Receive Abort and Transmit Start (Transmission/Reception Switchover)
Receive data processing
Receive operation ends
Transmit enabled state.
If there is transmit data,
the data is transmitted.
Reception in progress
Clear KBF flag
Processing 1
(KCLK = H)
normally
Figure 17.7 Sample Receive Abort Processing Flowchart (cont)
Keyboard side monitors clock during
receive operation (transmit operation
as seen from keyboard), and aborts
receive operation during this period.
[1]
Receive abort request
Timing
[1] On the system side, drive the KCLK pin low,
setting the I/O inhibit state.
Rev. 4.00 Sep 27, 2006 page 575 of 1130
Section 17 Keyboard Buffer Controller
Transmit operation
Start bit
REJ09B0327-0400
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