Any Slow Built-In Peripherals?

Development Boards MicroMod
1

I’m going down the list of peripherals in the LPC2148 and writing “Hello, world” programs to make them go, but I haven’t come across any that don’t work at the full 60MHz clock with no VPB divisor. However, the 2148 data sheet says the peripheral bus clock is initialized to 1/4 speed “because the VPB bus must work properly at power-up…”

Are there any built-in peripherals that wouldn’t work with the VPB running at full speed, or is the slow boot-up condition only for external peripherals?

Thanks!

2

This is from the FAQ section on the Philips website:

http://www.standardics.philips.com/supp … ripherals/

Q Can I run the peripherals at full speed?

A Yes. The peripherals clock (PCLK) can be fed by the system clock (CCLK) by setting the VPBDIV register to 1. All the peripherals can run at full speed as per the specification.

3

CM600:
This is from the FAQ…

Oops...should've found it myself. Thanks!