M38503G4AFP#U1 Renesas Electronics America, M38503G4AFP#U1 Datasheet - Page 27

• Manufacturer Part Number: M38503G4AFP#U1
• Description: IC 740/3850 MCU QZ-ROM 42SSOP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38503G4AFP#U1

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 12.5MHz
• Connectivity: SIO, UART/USART
• Peripherals: PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: QzROM
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 9x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 42-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

3850 Group (Spec.A QzROM version)
Rev.2.13
REJ03B0125-0213
(2) Asynchronous Serial I/O (UART) Mode
Clock asynchronous serial I/O mode (UART) can be selected by
clearing the serial I/O1 mode selection bit (b6) of the serial I/O1
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.
The transmit and receive shift registers each have a buffer, but
the two buffers have the same address in memory. Since the shift
register cannot be written to or read from directly, transmit data
Fig 22. Block diagram of UART serial I/O1
P2
P2
P2
6
/S
4
5
/R
/T
CLK1
X
X
X
D
IN
D
Apr 17, 2009
ST detector
BRG count source selection bit
1/4
Character length selection bit
7 bits
8 bits
Character length selection bit
Page 25 of 56
OE
Serial I/O1 synchronous clock selection bit
PE FE
Receive buffer register
Receive shift register
ST/SP/PA generator
Frequency division ratio 1/(n+1)
Data bus
Data bus
Baud rate generator
SP detector
Transmit buffer register
Transmit shift register
Address 0018
Address 001C
Address 0018
is written to the transmit buffer register, and receive data is read
from the receive buffer register.
The transmit buffer register can also hold the next data to be
transmitted, and the receive buffer register can hold a character
while the next character is being received.
16
16
1/16
Serial I/O1 control register
Clock control circuit
16
Transmit interrupt source selection bit
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Serial I/O1 status register
Address 001A
1/16
Transmit buffer empty flag (TBE)
Transmit shift
completion flag (TSC)
UART control register
Transmit interrupt request (TI)
16
Address 0019
Address 001B
16
16