UPD78F0500AMC-CAB-AX Renesas Electronics America, UPD78F0500AMC-CAB-AX Datasheet - Page 549

• Manufacturer Part Number: UPD78F0500AMC-CAB-AX
• Description: MCU 8BIT 30SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0500AMC-CAB-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
(5) Automatic transmit/receive interval time
SCKA0
ACSIIF
When using the automatic transmit/receive function, the read/write operations from/to the internal buffer RAM are
performed after transmitting/receiving one byte. Therefore, an interval is inserted before the next transmit/receive
operation.
Since the read/write operations from/to the buffer RAM are performed in parallel with the CPU processing when
using the automatic transmit/receive function by the internal clock, the interval depends on the value which is set
in automatic data transfer interval specification register 0 (ADTI0) and bits 5 (STBE0) and 4 (BUSYE0) of serial
status register 0 (CSIS0).
When ADTI0 is cleared to 00H, an interval time based on the to STBE0 and BUSYE0 settings is inserted. If
ADTI0 = 00H and STBE0 = BUSYE0 = 1, for example, then an interval time of two clocks is inserted, and the
interval time can be further extended by using an external busy signal. If an interval time of two clocks or more is
set by using ADTI0, then the interval time set by ADTI0 is inserted, regardless of the settings of STBE0 and
BUSYE0. When BUSYE0 = 1, the interval time can be further extended by an external busy signal.
Example Interval time when ADTI0 = 00H and busy signal is not generated
SOA0
SIA0
ACSIIF:
Figure 17-28. Example of Interval Time for Automatic Transmission/Reception
<1> When STBE0 = 1, BUSYE0 = 0: Interval time of two serial clocks is generated
<2> When STBE0 = 0, BUSYE0 = 1: Interval time of one serial clock is generated
<3> When STBE0 = 1, BUSYE0 = 1: Interval time of two serial clocks is generated
D7
D7 D6 D5 D4 D3 D2 D1 D0
D6 D5 D4 D3 D2 D1
Interrupt request flag
(When ADTI0 = 00H, STBE0 = 1, BUSYE0 = 0 (Two Clocks))
D0
Interval
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
CHAPTER 17 SERIAL INTERFACE CSIA0
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