M32C80 Datasheet, PDF (266/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
21. Intelligent I/O (Communication Function)
SI/O Communication Control Register i (i=0, 1)
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
G0CR, G1CR
Address
00EF16, 012F16
After Reset
0000 X0112
Bit
Symbol
Bit Name
Function
RW
TI ^{Transmit Buffer}
Empty Flag
0: Data in the GiTB register
1: No data in the GiTB register
RO
0: Data in the transmit register
TXEPT
Transmit Register
Empty Flag
(during transmission)
1: No data in the transmit register
RO
(transmit completed)
Receive Complete 0: No data in the GiRB register
RI _Flag
1: Data in the GiRB register
RO
Nothing is assigned. When write, set to "0".
(b3) When read, its contents is indeterminate.
TE
Transmit Enable Bit
0: Transmit disabled
1: Transmit enabled
RW
0: Receive disabled
RE Receive Enable Bit _{1: Receive enabled}
RW
Reserved Bit
Set to "0"
RW
(b7 - b6)
SI/O Receive Buffer Register i (i=0, 1)
b15
b8 b7
b0
Symbol
Address
After Reset
G0RB, G1RB 00E916-00E816, 012916-012816 XXX0 XXXX XXXX XXXX2
Bit
Symbol
Bit Name
Function
RW
(b7 - b0)
Received data
RW
Nothing is assigned.
(b11 - b8) When read, its content is indeterminate.
OER Overrun Error Flag
0: No overrun error
1: Overrun error found
RO
Nothing is assigned.
(b15 - b13) When read, its content is indeterminate.
Figure 21.3 G0CR and G1CR Registers, G0RB and G1RB Registers
Rev. 1.00 Nov. 01, 2005 ^{Page 247} of 330
REJ09B0271-0100