M38588GCSP#U0 Renesas Electronics America, M38588GCSP#U0 Datasheet - Page 46

• Manufacturer Part Number: M38588GCSP#U0
• Description: IC 740/3858 MCU QZ-ROM 42DIP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38588GCSP#U0

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 12.5MHz
• Connectivity: SIO, UART/USART
• Peripherals: PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: QzROM
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 9x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

3858 Group
(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
Fig. 38 Block diagram of UART serial I/O1
REJ03B0139-0111
page 44 of 73
P2
P2
P2
6
/S
4
5
/R
/T
CLK1
X
X
X
D
IN
D
ST detector
BRG count source selection bit
Rev.1.11
1/4
Character length selection bit
Character length selection bit
Dec 18, 2008
8 bits
7 bits
Serial I/O1 synchronous clock selection bit
OE
Address 0018
PE FE
Receive buffer register
Receive shift register
Frequency division ratio 1/(n+1)
ST/SP/PA generator
Data bus
Data bus
16
Transmit buffer register
Baud rate generator
Transmit shift register
SP detector
Address 001C
Address
Serial I/O1 control register
two buffers have the same address in memory. Since the shift reg-
ister cannot be written to or read from directly, transmit data 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.
1/16
16
Clock control circuit
0018
16
Receive interrupt request (RI)
Receive buffer full flag (RBF)
Transmit interrupt source selection bit
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
Address 001B
0019
16
16