HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 337

• Manufacturer Part Number: HD6433045
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

Each TIOR is an 8-bit readable/writable register that selects the output compare or input capture
function for GRA and GRB, and specifies the functions of the TIOCA and TIOCB pins. If the
output compare function is selected, TIOR also selects the type of output. If input capture is
selected, TIOR also selects the edge or edges of the input capture signal.
TIOR is initialized to H'88 by a reset and in standby mode.
Bit 7—Reserved: Read-only bit, always read as 1.
Bits 6 to 4—I/O Control B2 to B0 (IOB2 to IOB0): These bits select the GRB function.
Bit 6
IOB2
0
1
Notes: 1. After a reset, the output is 0 until the first compare match.
Bit
Initial value
Read/Write
2. Channel 2 output cannot be toggled by compare match. This setting selects 1 output
Bit 5
IOB1
0
1
0
1
instead.
Reserved bit
Bit 4
IOB0
0
1
0
1
0
1
0
1
—
—
7
1
I/O control B2 to B0
These bits select GRB functions
IOB2
R/W
Function
GRB is an output
compare register
GRB is an input
capture register
6
0
IOB1
R/W
5
0
325
IOB0
R/W
4
0
No output at compare match
0 output at GRB compare match
1 output at GRB compare match
Output toggles at GRB compare match
(1 output in channel 2)
GRB captures rising edge of input
GRB captures falling edge of input
GRB captures both edges of input
Reserved bit
—
—
3
1
IOA2
R/W
I/O control A2 to A0
These bits select GRA
functions
2
0
*1, *2
IOA1
R/W
1
0
*1
*1
(Initial value)
IOA0
R/W
0
0