M38039GCHKP#U0 Renesas Electronics America, M38039GCHKP#U0 Datasheet - Page 57

• Manufacturer Part Number: M38039GCHKP#U0
• Description: IC 740/3803 MCU QZROM 64LQFP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38039GCHKP#U0

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 16.8MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, PWM, WDT
• Number Of I /o: 56
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: QzROM
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

3803 Group (Spec.H QzROM version)
REJ03B0166-0113 Rev.1.13
Page 55 of 100
(2) Asynchronous Serial I/O (UART) Mode
Clock asynchronous serial I/O mode (UART) can be selected by
clearing the serial I/O3 mode selection bit (b6) of the serial I/O3
control register to “0”.
Eight serial data transfer formats can be selected, and the transfer
formats used by a transmitter and receiver must be identical.
Fig 46. Block diagram of UART serial I/O3
Fig 47. Operation of UART serial I/O3
Transmit buffer register 3
Receive buffer register 3
(f(X
CIN
) in low-speed mode)
P3
P3
P3
receive clock
6
Serial output
4
5
/S
Transmit or
write signal
Serial input
/R
read signal
/T
f(X
CLK3
X
X
D
IN
D
Notes 1: Error flag detection occurs at the same time that the RBF flag becomes “1” (at 1st stop bit, during reception).
3
3
R
)
T
X
X
D
D
3
3
2: As the transmit interrupt (TI), when either the TBE or TSC flag becomes “1”, can be selected to occur depending on the setting of the transmit interrupt source
3: The receive interrupt (RI) is set when the RBF flag becomes “1”.
4: After data is written to the transmit buffer register 3 when TSC=1, 0.5 to 1.5 cycles of the data shift cycle are necessary until changing to TSC=0.
selection bit (TIC) of the serial I/O3 control register.
ST detector
BRG count source selection bit
TBE=0
TSC=0
TBE=1
1/4
ST
ST
Character length selection bit
7 bits
8 bits
Character length selection bit
Aug 21, 2009
D
D
0
0
OE
Serial I/O3 synchronous clock selection bit
D
D
1
TBE=0
1
1 start bit
7 or 8 data bit
1 or 0 parity bit
1 or 2 stop bit (s)
PE FE
Receive buffer register 3
Receive shift register 3
ST/SP/PA generator
Frequency division ratio 1/(n+1)
Data bus
Baud rate generator 3
Data bus
Transmit buffer register 3
SP detector
Transmit shift register 3
Address 0030
Address 002F
The transmit and receive shift registers each have the buffer
register 3, but the two buffers have the same address in a
memory. Since the shift register cannot be written to or read from
directly, transmit data is written to the transmit buffer register 3,
and receive data is read from the receive buffer register 3.
The transmit buffer register can also hold the next data to be
transmitted, and the receive buffer register 3 can hold a character
while the next character is being received.
Address 0030
16
16
1/16
RBF=1
SP
SP
Serial I/O3 control register
TBE=1
Clock control circuit
16
ST
ST
Transmit interrupt source selection bit
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Serial I/O3 status register
D
D
0
0
RBF=0
D
D
1
1
Address 0032
1/16
Transmit buffer empty flag (TBE)
Transmit shift
completion flag (TSC)
* Generated at 2nd bit in 2-stop-bit mode
UART3 control register
Transmit interrupt request (TI)
16
Address 0031
Address 0033
16
16
TSC=1*
SP
RBF=1
SP