RDC
®
RISC DSP Controller
R8810LV
RDC Semiconductor Co.
Rev:1.2
Subject to change without notice
23
Set 0 : Enable the CLKOUTA.
Bit 7-3
: Reserved
Bit 2-0: F2- F0,
Clock Divisor Select.
F2, F1, F0
-----
Divider Factor
0, 0, 0 ---- Divide by 1
0, 0, 1 ---- Divide by 2
0, 1, 0 ---- Divide by 4
0, 1, 1 ---- Divide by 8
1, 0, 0 ---- Divide by 16
1, 0, 1 ---- Divide by 32
1, 1, 0 ---- Divide by 64
1, 1, 1 ---- Divide by 128
Reset
Processor initialization is accomplished with activation of the RST pin. To reset the processor, this pin should be held low
for at least seven oscillator periods. The Reset Status Figure shows the status of the RST pin and others relation pins.
When RST from low go high , the state of input pin (with weakly pull-up or pull-down) will be latched , and each pin will
perform the individual function. The AD7-AD0, AO15-AO8 will be latched into the register F6h. UCS /
1
ONCE ,
LCS /
0
ONCE
enter ONCE mode (All of the pins will floating except X1 , X2) when with pull-low resisters. The input clock
will be divided by 2 when S6/
2
CLKDIV
with pull-low resister. The AD7-AD0, AO15-AO8 will not drive the address phase
during UCS , LCS cycle if BHE / ADEN with pull-low resister