Serial Module General Timing Diagram | Motorola MC68340 specification

Freescale Semiconductor, Inc.

11.10 SERIAL MODULE ELECTRICAL SPECIFICATIONS (See notes (a), (b), (c), and

(d) corresponding to part operation, GND = 0 Vdc, TA = 0 to 70°C; see numbered notes; see Figures 11-15–11-18)

Semiconductor, Inc...

Num.Characteristic

1 CLKOUT Cycle Time

2 Clock Rise or Fall Time

32	Clock Input (X1 or SCLK ) Synchronizer Setup
	Time

4Clock Input (X1 or SCLK ) Synchronizer Hold Time

5 TxD Data Valid from CLKOUT High

6 X1 Cycle Time

7 X1 High or Low Time

8SCLK High or Low Time, Asynchronous (16x) Mode

91 SCLK High Time, Synchronous (1x) Mode

10SCLK Low Time, Synchronous (1x) Mode

11TxD Data Valid from SCLK Low, Synchronous (1x) Mode

12RxD Setup Time to SCLK High, Synchronous (1x) Mode

13RxD Hold Time from SCLK High, Synchronous (1x) Mode

			3.3 V or
	3.3 V		5.0 V		5.0 V
	8.39 MHz		16.78 MHz		25.16 MHz
Symbol	Min	Max	Min	Max	Min	Max	Unit
tcyc	119.2	—	59.6	—	40	—	ns
trf	—	20	—	10	—	5	ns
tCS	15	—	8, 5	—	5	—	ns
tCH	30	—	15	—	8	—	ns
tVLD			0.5 t cyc				Max
tX1			2.25 t cyc				Min
tX1HL		0.55 t cyc + 0.75(tCS + t CH )					Min
tAHL			tcyc + t CS + t CH				Min
tSH		tcyc (Gx) + tCS (Gx) + tCH (Gx)					Min
tSL			greater of				Min
	({1.5tcyc (Tx) + t CS (Tx) + t VLD (Tx)} +
	0.5tcyc (Rx) + t CS (Rx) + t CH (Rx)})
				or
				tSH
tT ⋅ D			1.5tcyc (Tx) +				Max
		tCS (Tx) + t VLD (Tx)
tR ⋅ S	0.5tcyc (Rx) + t CS (Rx) + t CH (Rx)						Min
tR ⋅ H	0.5tcyc (Rx) + t CS (Rx) + t CH (Rx)						Min

Freescale

NOTES:

(a)The electrical specifications in this document for both the 8.39 and 16.78 MHz @ 3.3 V ±0.3 V are preliminary and apply only to the appropriate MC68340V low voltage part.

(b)The 16.78-MHz specifications apply to the MC68340 @ 5.0 V ±5% operation.

(c)The 25.16 MHz @ 5.0 V ±5% electrical specifications are preliminary.

(d)For extended temperature parts T A = –40 to +85°C. These specifications are preliminary.

1.Asynchronous operation numbers take into account a receiver and transmitter operating at different clock frequencies. (Rx) refers to receiver value. (Tx) refers to transmitter value. (Gx) refers to the value that is greater, either receiver or transmitter.

2.Specification #3 for 16.78 MHz @ 3.3 V ±0.3 V will be 8 ns.

CLKOUT

TxD

Figure 11-15. Serial Module General Timing Diagram

11-22MC68340 USER’S MANUALMOTOROLA

For More Information On This Product,

Go to: www.freescale.com

MC68340 specifications

The Motorola MC68340 is a highly integrated microprocessor that was introduced in the early 1990s. It belongs to the 68000 family of microprocessors and is designed to cater to the demands of embedded systems, particularly in telecommunications and networking applications. This chip represents a significant evolution in microprocessor technology by combining a microprocessor core with additional peripherals on a single chip, making it an attractive solution for engineers looking to design compact and efficient systems.

One of the key features of the MC68340 is its 32-bit architecture, which allows for significant processing power and data handling capabilities. This architecture enables the processor to handle larger data sizes and perform more complex calculations compared to its 16-bit predecessors. The MC68340 operates at clock speeds typically ranging from 16 MHz to 25 MHz. Its dual instruction pipeline enhances throughput, allowing for simultaneous instruction fetches and executions, which significantly boosts performance.

A notable characteristic of the MC68340 is the inclusion of integrated peripherals, which help reduce the overall component count in a system. Key integrated components include a memory management unit (MMU), a direct memory access (DMA) controller, and various communication interfaces such as serial ports. The memory management capabilities enhance the processor's ability to manage memory resources efficiently, enabling it to support multitasking environments commonly found in modern computing.

In terms of connectivity, the MC68340 features connections for both synchronous and asynchronous serial communication, making it well-suited for networking tasks. The processor supports a range of bus standards, including address and data buses, which facilitate seamless interaction with peripheral devices.

Another important aspect of the MC68340 is its flexibility. The processor supports multiple operating modes, including multiple CPU configurations and compatibility with the Motorola 68000 family, allowing for easier integration into existing systems.

Moreover, the MC68340 boasts low power consumption compared to many of its contemporaries, making it an excellent choice for battery-operated applications, enhancing its appeal in sectors like telecommunications, industrial control, and automotive systems. Its combination of performance, integration, versatility, and efficiency has secured the MC68340 a reputable position in the annals of embedded systems technology, proving to be a valuable asset for developers and engineers alike.

Motorola MC68340 manual Serial Module General Timing Diagram

Models: MC68340

Num.Characteristic

8.39 MHz

Freescale

Figure 11-15. Serial Module General Timing Diagram

MC68340 specifications