Hi, During development of our product using the RX631 we have moved to using G-grade chips and thus have TSCDR available for calculating the temperature of the chip. We are using the RX631 in various package formats across the project components. Unfortunately we have some units that do not have the G-grade chips. On these systems TSCDR reads as 0xFFFF and on others 0x0000. Is there a way for the program to determine if TSCDR is valid or not? I haven't been able to find where it says the value should be 0xFFFF or 0x0000 on non G-grade chips so I'm not confident that simply checking against 0xFFFF or 0x0000 will always work now and into the future. Is there another mechanism I could use to determine whether its a G-grade chip and thus whether TSCDR is valid. Via JTAG there appears to be an identification register but I haven't found how to access this from my program. Thanks, Leon
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