HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 802

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 22
22.3.2
MRCR is the counter that specifies make ratio of dial pulse. Make interval is specified with
AFE_FS as base clock of 9,600 Hz.
Pulse signal is not output when an invalid data (a data that is greater than 1E0H in case of PPS = 1
(20 pps), or a data that is greater than 3C0H in case of PPS = 0 (10 pps)) was input.
22.3.3
MPCR is a counter that sets the dial number interval of the dial pulse. The interval is specified
with AFE_FS as base clock of 9600 Hz.
22.3.4
ASTR is the control register for AFEIF, and composed of ASTR1 and ASTR2. ASTR1 is mainly
used for transmit/receive FIFO interrupt control commands. ASTR2 is used for DAA interrupt
control commands. See section 22.4.1, Interrupt Timing for more detail about interrupt handling.
(1)
ASTR1 is composed by interrupt status flags (4 bits) relating transmit/receive FIFO and mask
flags (4 bits) for transmit/receive FIFO interrupt signal. Status flag displays full/empty interrupt
status of transmit/receive FIFO and half size interrupt status for FIFO. FIFO empty (TFE) and
FIFO half size interrupt (THE) shows "1" as initial value, because transmit FIFO is empty after
power on reset. These interrupt flags are to be cleared with the data write / read action to FIFO
from CPU.
Rev. 3.00 Jan. 18, 2008 Page 740 of 1458
REJ09B0033-0300
Bit
15 to 10 
9 to 0
Bit
15 to 0
AFEIF Status Register 1 (ASTR1)
Make Ratio Count Register (MRCR)
Minimum Pause Count Register (MPCR)
AFEIF Status Register 1 and 2 (ASTR1, ASTR2)
Bit Name
MRCR9 to
MRCR0
Bit Name
MPCR15 to
MPCR0
Analog Front End Interface (AFEIF)
Initial Value
All 0
0
Initial Value
0
R/W
R
R/W
R/W
R/W
Description
Reserved
These bits are always read as 0. The write
value should always be 0.
Specifies make ratio of dial pulse.
Description
Sets the dial number interval of the dial pulse.