HD6473837H Renesas Electronics America, HD6473837H Datasheet - Page 261

• Manufacturer Part Number: HD6473837H
• Description: IC H8 MCU OTP 60K 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD6473837H

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 5MHz
• Connectivity: SCI
• Peripherals: LCD, PWM
• Number Of I /o: 84
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Data Transfer Operations
SCI2 Initialization: Data transfer on SCI2 first of all requires that SCI2 be initialized by software
as follows.
Transmitting: A transmit operation is carried out as follows.
244
With bit STF cleared to 0 in SCSR2, select pin functions and the transfer mode in registers
PMR2, PMR3, STAR, EDAR, and SCR2.
The SCI2 pins double as general input/output ports. Switching between port and SCI2
functions is controlled in PMR3. CMOS output or NMOS open drain output can be selected in
PMR2. The serial clock and gaps between transferred bytes are set in SCR2.
The start and end addresses of the transfer data area are set in STAR and EDAR. If the end
address is set smaller than the start address, as shown in figure 10.6, the transfer wraps around
from H'FF9F to H'FF80 and continues to the end address. If the start address and end address
are the same, only one byte of data will be transferred.
Set bits SO2 and SCK2 in PMR3 TO 1 so that the respective pins function as SO
necessary, set bit POF2 in port mode register 2 (PMR2) for NMOS open-drain output at pin
SO
Select the serial clock and, in the case of internal clock operation, the data gap in SCR2.
Write transmit data in the serial data buffer. This data will remain in the data buffer after
completion of the transfer. It is not necessary to rewrite the buffer when the same data is
retransmitted.
Set the start address in the lower 5 bits of STAR, and the end address in the lower 5 bits of
EDAR.
Set the start/busy flag (STF) to 1. If bit CS = 0 in PMR3, transmission starts as soon as STF is
set to 1. If CS = 1 in PMR3, transmission starts when CS goes low.
After data transmission is complete, bit IRRS2 in interrupt request register 2 (IRR2) is
set to 1, and bit STF is cleared to 0.
2
, and set bits CS and STRB in PMR3 to designate use of the CS and STRB pin functions.
Figure 10.6 Operation When End Address is Smaller than Start Address
End
Start
H'FF80
End address
Start address
H'FF9F
2
and SCK
2
. If