HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 500

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 13 Serial Communication Interface (SCI)
13.2
13.2.1
RSR is a register used to receive serial data.
The SCI sets serial data input from the RxD pin in RSR in the order received, starting with the
LSB (bit 0), and converts it to parallel data. When one byte of data has been received, it is
transferred to RDR automatically.
RSR cannot be directly read or written to by the CPU.
13.2.2
RDR is a register that stores received serial data.
When the SCI has received one byte of serial data, it transfers the received serial data from RSR to
RDR where it is stored, and completes the receive operation. After this, RSR is receive-enabled.
Since RSR and RDR function as a double buffer in this way, enables continuous receive
operations to be performed.
RDR is a read-only register, and cannot be written to by the CPU.
RDR is initialized to H'00 by a reset, in standby mode, watch mode * , subactive mode * , and
subsleep mode * or module stop mode.
Note: * Subclock functions (subactive mode, subsleep mode, and watch mode) are available in the
Page 450 of 1458
Bit
Initial value
R/W
Bit
R/W
U-mask and W-mask versions, and H8S/2635 Group only. These functions cannot be used
with the other versions.
Register Descriptions
Receive Shift Register (RSR)
Receive Data Register (RDR)
:
:
:
:
:
⎯
7
R
7
0
⎯
6
R
6
0
⎯
5
R
5
0
⎯
4
R
4
0
⎯
3
R
3
0
⎯
2
R
2
0
H8S/2639, H8S/2638, H8S/2636,
REJ09B0103-0800 Rev. 8.00
H8S/2630, H8S/2635 Group
⎯
1
R
1
0
⎯
May 28, 2010
0
R
0
0