UM_8014_010 73S8014R/RN/RT 20SO Demo Board User Manual
Rev. 1.0 5
1.3 Getting Started
The Figure 1.1 shows the basic connections of the Demo Board.
• Power Supplies: Apply 3.3V to pin 10 of J4 and 5V to pin 10 of J2.
• Control signals to the device can be connected through J2 and J4 (see Figure 1.1 and the electrical
schematic Figure 4.1)
• Setting the clock frequency with an external clock source
o Set JP1 to the SCLK setting
o Apply clock source to pin 1 of J2
o Apply 3.3V (1) or GND (0) to CLKDIV1 and CLKDIV2 pins allows the following:
- CLKDIV1 = CLKDIV2 = 0
- 73S8014R clock frequency = SCLK/8
- 73S8014RN/RT clock frequency = SCLK/6
- CLKDIV1 = 0, CLKDIV2 =1 clock frequency = SCLK/4 (all)
- CLKDIV1 = 1, CLKDIV2 =0 clock frequency = SCLK (all)
- CLKDIV1 = CLKDIV2 = 1 clock frequency = SCLK/2 (all)
• Setting the clock frequency using crystal Y1
o Crystal included in the Demo Board is 12MHz (NDS applications can use 27MHz)
o Set JP1 to XTAL position
o Apply 3.3V (1) or GND (0) to CLKDIV1 and CLKDIV2 pins allows the following:
- CLKDIV1 = CLKDIV2 = 0
9 12MHz XTAL – clock frequency = 1.5MHz
9 27MHz XTAL – clock frequency = 4.5MHz
- CLKDIV1 = 0, CLKDIV2 =1 clock frequency = 3MHz
9 12MHz XTAL – clock frequency = 3MHz
9 27MHz XTAL – clock frequency = 6.75MHz
- CLKDIV1 = 1, CLKDIV2 = 0 – clock frequency = 12MHz
9 12MHz XTAL – clock frequency = 12MHz
9 27MHz XTAL – Illegal setting. Clock is not guaranteed to be stable as the device spec
max CLK frequency is 20MHz.
- CLKDIV1 = CLKDIV2 = 1 clock frequency = 6MHz
9 12MHz XTAL – clock frequency = 6MHz
9 27MHz XTAL - clock frequency = 13.5MHz
