Description

The LS7166A is a CMOS, 24-bit counter which can be programmed to operate in several functional modes. The operating modes are set up by writing configuration data into control registers. There are three 6-bit and one 2-bit control registers for configuring the functional modes. In addition to the control registers there is a 5-bit status register which indicates the instantaneous device status. A 24-bit preset register is available for presetting the counter. It also serves as the division factor in the mod-N count mode. The device communicates with a host controller over an 8-bit 3-state bidirectional data bus through read/written operations. In addition, a number of discrete inputs and outputs facilitate instantaneous hardware control functions and instantaneous status indication.

Features:

• Programmable count modes: non-quadrature, up/down, quadrature x1, x2, or x4, binary, BCD, 24-hour clock, mod-N and single cycle.
• Up to 40MHz count frequency in non-quandrature mode.
• 24-bit counter, 24-bit preset register and 24-bit comparator.
• 8-bit bi-directional data bus for uC interface.
• Readable status register.
• Carry, borrow, carry toggle, and borrow toggle outputs
• Compare and compare toggle outputs for counter to preset register equality
• Programmable inputs for dynamic hardware control.
• TTL and CMOS compatible IOs.