HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 261

• Manufacturer Part Number: HD6477021X20V
• Description: MCU 5V 32K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7020r

Specifications of HD6477021X20V

• Core Processor: SH-1
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

10.3.2
All registers other than the TCNT, general registers, and buffer registers are 8-bit registers. These
are connected to the CPU by an 8-bit data bus. Figures 10.12 and 10.13 illustrate reading and
writing in byte units with the timer control register (TCR). These registers must be accessed by
byte access.
CPU
CPU
CPU
8-Bit Accessible Registers
Internal data bus
Internal data bus
Internal data bus
H
H
L
L
H
L
Figure 10.10 Accessing TCNT (TCNT–CPU (upper byte))
Figure 10.11 Accessing TCNT (TCNT–CPU (lower byte))
Figure 10.9 Accessing TCNT (CPU–TCNT (lower byte))
interface
interface
interface
Bus
Bus
Bus
TCNTH
TCNTH
TCNTH
TCNTL
TCNTL
TCNTL
H
H
H
L
L
L
RENESAS 243
Module
data bus
Module
data bus
Module
data bus