HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 436

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 12 Serial Communication Interface
Rev. 2.00 Sep 20, 2005 page 396 of 800
REJ09B0260-0200
Figure 12.12 Sample Flowchart for Receiving Multiprocessor Serial Data
No
No
No
Read ORER and FER flags
Read receive data from RDR
Read ORER and FER flags
Set MPIE bit to 1 in SCR
Read RDRF flag in SSR
Read RDRF flag in SSR
Clear RE bit to 0 in SCR
Read RDRF flag in SSR
Finished receiving?
FER
FER
Start receiving
RDRF = 1
RDRF = 1
Own ID?
Initialize
in SSR
in SSR
<End>
ORER = 1
ORER = 1
Yes
Yes
Yes
Yes
No
No
Yes
No
Yes
Error handling
(1)
(2)
(3)
(continued on next page)
(4)
(5)
(1)
(2)
(3)
(4)
(5)
SCI initialization:
the receive data input function of the
RxD pin is selected automatically.
ID receive cycle:
set the MPIE bit to 1 in SCR.
SCI status check and ID check:
read SSR, check that the RDRF flag
is set to 1, then read data from RDR
and compare it with the processor's
own ID. If the ID does not match, set
the MPIE bit to 1 again and clear the
RDRF flag to 0. If the ID matches,
clear the RDRF flag to 0.
SCI status check and data receiving:
read SSR, check that the RDRF flag
is set to 1, then read data from RDR.
Receive error handling and break
detection:
if a receive error occurs, read the
ORER and FER flags in SSR to
identify the error. After executing the
necessary error handling, clear the
ORER and FER flags both to 0.
Receiving cannot resume while either
the ORER or FER flag remains set to
1. When a framing error occurs, the
RxD pin can be read to detect the
break state.