m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 265

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

Fig. 11.2.6 Structure of UARTi transmit buffer register
SERIAL I/O
11.2 Block description
Fig. 11.2.5 Block diagram for transmitter
11-10
11.2.4 UARTi transmit register and UARTi transmit buffer register
Figure 11.2.5 shows the block diagram for the transmitter; Figure 11.2.6 shows the structure of UARTi
transmit buffer register.
SP : Stop bit
PAR : Parity bit
SP
UART0 transmit buffer register (Addresses
UART1 transmit buffer register (Addresses
UART2 transmit buffer register (Addresses
Note: Use the MOVM (MOVMB) or STA (STAB, STAD) instruction for writing to this register.
15 to 9
8 to 0
Bit
SP
2SP
1SP
Transmit data is set.
Nothing is assigned.
PAR
Parity
enabled
Parity
disabled
0
Clock sync.
UART
7905 Group User’s Manual Rev.1.0
Clock sync.
7-bit UART
9-bit UART
8-bit UART
D
8
33
3B
B3
Function
16
Data bus (odd)
Data bus (even)
16
16
8-bit UART
9-bit UART
Clock sync.
, 32
, 3A
, B2
D
7-bit UART
16
7
16
16
)
)
)
(b15)
b7
D
6
D
5
UARTi transmit register
D
4
D
3
D
2
(b8)
b0
D
b7
1
D
0
UARTi transmit
buffer register
Undefined
Undefined
At reset
R/W
WO
TxD
—
b0
i