W681307DG Datasheet, PDF (77/160 Pages) Winbond – USB1.1 CODEC Microprocessor Control Unit with 32KB Mask ROM and 4KB RAM.

W681307
11.5.5
Multiplier_Enable
Address
0x1474
Access Mode Value At Reset Nominal Value
R/W
0x00
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
Bit 0
Mul8x8_en
Mul8x8_en
This is an enable bit of a fast 8x8 multiplier in T8032.When set this bit, a fast T8032 internal 8x8 multiplier will be
active otherwise the original T8032 add-shift multiplier is the default choice.
11.6
In System Programming Mode
In System Programming mode is designed for fast program on board flash. Flash type includes 29, 39 and 49 series. The chip is provided
two ISP entry modes. One is hardware setting and the other is software command mode.
This function comes with the PC software, which transfer the binary code to internal T8032 to program the external ROM flash. ISP
function use internal T8032 UART or USB port to transfer data, the default baud rate of the UART port is 9600bps, which can be set by
remote PC program. There are four baud-rates for selection, 9600bps, 19200bps, 28800bps and 57600bps. The double-speed MCU chip
(2x), you can select optional 115200bps for flash program.
11.6.1
Hardware Setting Usage
In the initial power-up state, the /CS2 pin will replaced as ISP function hardware setting pin. When /CS2 pin set to low and re-power up
the system, the chip will execute the internal ISP code, and wait for PC command and binary data to update the external ROM flash. If the
/CS2 is set to output purpose pin (the pin is default pull-up), this chip will in normal mode. The flash needed an external write signal. The
ISP_WR pin of the chip needs to connect to the /WR pin of the external Flash and which pin only active in ISP operation.
11.6.2
Software Command Usage
This ISP function can provide the system program update from the internal USB or UART ports with software command
and don’t need any hardware modification. Therefore the baseband chip doesn’t need extra circuit to support this function.
Figure 11-6 is shown the function description and specification.
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Publication Release Date: May, 2007
Revision 1.3