tc9447f TOSHIBA Semiconductor CORPORATION, tc9447f Datasheet - Page 15

• Manufacturer Part Number: tc9447f
• Description: Single-chip Audio Digital Signal Processor
• Manufacturer: TOSHIBA Semiconductor CORPORATION

(3-3) Monitor mode
(3-4) MCU does not write data by ACMP mode at I
Monitor mode is used to monitor the data bus or pointers.
There are two further modes: a mode where the data bus or pointer (s) is monitored at a preset
program counter (PC) and a mode where a loop counter (LC) is added to monitor conditions in
addition to the PC.
First, issue the monitoring command, which has no data.
When the TC9447F loads data to the IFDO register (IFDOR), the IFOK pin signal is set to Low
(see (1) above).
Next, the I
output on the IFCK signal falling edge starting from the MSB. The data length is at its maximum
(24 bits or three bytes) during monitoring of the data bus. In cases where transfer must be
interrupted, such as where only eight or 16 bits of the MSB side are required, monitoring can be
interrupted by sending the I
After issuing a monitor command (50h~56h), be sure to perform a continuous read operation by
issuing the I
2
C read command (ID = 33h) is issued, then when the IFCK signal is sent, the data are
2
C read command (ID = 33h).
2
C end condition (set data level to H while the clock = H).
15
2
C bus controlling.
2002-02-05
TC9447F