The Samsung S3C2442B is the CPU of the Neo1973 GTA02. It is based on an ARM920T core.
The datasheet for this is at this link.
One difference is that the CPU voltage limits are specified variably from 400Mhz (1.5V) to 50Mhz (1V) the current at these speeds is not mentioned.
[...] apart from two differences, [the S3C2442B] is software/register-wise exactly identical to the s3c2440. Hardware-wise it is packaged with 64MByte (x32) SDRAM and depending on the type, 128/256MByte NAND flash (2k page size). The differences are: 1) all pull-up resistors (GPBUP, ...) are now pull-down 2) the default initializers for the PLL have changed [...]