EM78P803B

8-bit Micro-controller

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2006/2/27

V1.3.5

5. Notice of ERIC Mode:

In ERIC mode, the RC oscillation circuit on the chip with an external resister provides the

system clock. There is no 32.768kHz clock because no crystal connects to the system. The sub

frequency which plays the role as the same as 32.768kHz is divided from system clock. User can

setup the scale factor by CODE option when downloading the program. Furthermore, to careful

to use the sub frequency clock when system working in ERIC mode. Some frequency didn’t

suggest might cause unpredictable condition. Please refer Sec.VII.15 for more detail

6. Common registers 0x20 ~ 0x3F only have three banks (banks 0,1,2). Notice that there is no bank

3 in these common registers. The bank 3 doesn’t exist.

7. Care must be taken while programming. When R4 (bit7,bit6) = (1,1), common registers 0x10 ~

0x1F cannot be read or written otherwise program maybe go to dead lock. ICE cannot reflect this

problem. This is incompatible situation between mask and ICE.

8. Notice of discrepancy of option code on ICE803, EM78P803B and EM78801

Option Name

ICE803

EM78P803B

EM78801

Two 8bits-counters mode

J7 connects GND

16CNT = 1

COP16CNT = 0

16CNT

COP16CNT

One 16bits-counter mode

J7 connects VDD

16CNT = 0

COP16CNT = 1

Slow mode

J5 connects GND

R2FHR = 1

COPR2FHR = 0

R2FHR

COPHIRES

Fast mode

J5 connects VDD

R2FHR = 0

COPR2FHR = 1