HD404328 Datasheet, PDF (52/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER

HD404328 Series
TMC
Bit 2
0
1
Bit 1
0
1
0
1
Bit 0
0
1
0
1
0
1
0
1
Input Clock Period
2048 t_cyc
1024 t_cyc
512 t_cyc
128 t_cyc
32 t_cyc
8 t_cyc
4 t_cyc
2 t_cyc
Pulse Output
The MCU has a built-in pulse output function called BUZZ. The pulse frequency can be selected from the
prescaler S’s outputs, and the output frequency depends on the state of port mode register C (PMRC:
$012), as shown in table 27. The duty cycle of the pulse output is fixed at 50%. When the pulse output
function is used, the R1₃/BUZZ pin must be specified as BUZZ by PMRC.
Table 27 Port Mode Register C
PMRC
Bit 1
0
1
Bit 0
0
1
0
1
Prescaler Division Ratio
÷ 1024
÷ 512
÷ 256
÷ 128
50