MIC2563A
Serial Control
Figure 6 shows conversion from a three-wire serial interface,
such as used by the Cirrus Logic CL-PD6730, to the standard
eight-line parallel interface used by the MIC2563A-1. This
interface requires three common, low cost 7400-series logic
ICs:
• 74x574 Octal D Flip-Flop
• 74x175 Quad Flip-Flop with Latches (two needed)
Either 3.3V or 5V logic devices may be used, depending upon
the control voltage employed by the slot logic controller. Pin
numbers in parenthesis refer to the MIC2563A-1BSM. Gerber
files for this PC board layout are available to Micrel custom-
ers. Please contact Micrel directly.
Another serial-to-parallel solution for this application is the
74HC594, 8-bit shift register with output registers. This de-
vice contains the eight D flip-flops plus has latched outputs
suitable for this purpose.
Serial Control Adapter PC Board Layout
Micrel
Component Key
U1 .................... MIC2563
U2, U3 ............. 74x175
U4 .................... 74x574
March 2004
11
M9999-033004
MICREL [ MICREL SEMICONDUCTOR ]
