Overview
Description
The 9214 clock generator provides the necessary clock signals to support the Rambus XDRTM memory subsystem and Redwood logic interface. The clock source is a reference clock that may or may not be modulated for spread spectrum. The 9214 provides 4 differential clock pairs in a space saving 28-pin TSSOP package and provides an off-the-shelf high-performance interface solution. Figure 1 shows the major components of the 9214 XDR Clock Generator. These include the a PLL, a Bypass Multiplexer and four differential output buffers. The outputs can be disabled by a logic low on the OE pin. An output is enabled by the combination of the OE pin being high, and 1 in its SMBus Output control register bit. The PLL receives a reference clock, CLK_INT/C and outputs a clock signal at a frequency equal to the input frequency times a multiplier. Table 2 shows the multipliers selectable via the SMBus interface. This clock signal is then fed to the differential output buffers to drive the enabled clocks. Disabled outputs are set to Hi-Z. The Bypass mode routes the input clock, CLK_INT/C, directly to the differential output buffers, bypassing the PLL. Up to four 9214 devices can be cascaded on the same SMBus. Table 3 shows the SMBus addressing and control for the four devices.
Features
- 400 - 500 MHz clock source
- 4 open-drain differential output drives with short term jitter < 40ps
- Spread spectrum compatible
- Reference clock is differential or single-ended, 100 or 133 MHz
- SMBus programmability for: - frequency multiplier - output enable - operating mode
- Supports frequency multipliers of: 3, 4, 5, 6, 8, 9/2, 15/2 and 15/4
- Support systems where XDR subsystem is asynchronous to other system clocks
- 2.5V power supply
Comparison
Applications
Design & Development
Support
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Support Communities
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DA14531 USB Dialog EVK kit with UART2
Hi, I have tried samples of Timer0_General and Blinky works fine over changing GPIO Tx pin (05) and UART (SW debug) interface. I want to same application over UART2, how can I configure the Mikcrobus socket and how to connect Rx point of UART receiver on which socket hole ...
Dec 16, 2021 -
add custom profile to user_empty_peripheral_templates
Hi, I just tried out ble_app_peripheral, now i want to add a custom service with 2 characteristics to user_empty_peripheral_templates project. I followed your document on creating a custom profile which is based on ble_app_peripheral project. But i couldn't get it to work ...
Dec 16, 2021 -
DA14531 USB Dialog EVK kit does not gives UART2 log.
Hi, I'm using the TIMER0_general example of (SDK 6.0.2) on DA14531-00FXDEVKT-U, I tried DIP UART2 wire and 4wire enabling condition, And connected TTL to USB from EVK to my PC to read the UART print but I could not see any printf_string logs ...
Dec 15, 2021