EM78P159NP datasheet(13/48 Pages) EMC

13 / 48 page

EM78P159N

8-Bit Microcontroller with OTP ROM

Product Specification (V1.0) 03.10.2006

• 9

(This specification is subject to change without further notice)

4.1.5 R4 (RAM Select Register)

Bits 0~5

are used to select registers (Address: 00~06, 0F~3F) in the indirect

addressing mode.

Bits 6~7

Not used (read only). Set these bits to “1” all the time.

The “Z” flag of R3 will set to “1” when the R4 content is equal to “3F.” When R4=R4+1,

the R4 content will select “R0.”

4.1.6 R5 ~ R6 (Port 5 ~ Port 6)

and R6 are I/O registers. Only the lower 7 bits of R5 are available.

4.1.7 RD (Manual Calibration Register)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

EM78P159N

ICE159N Simulator

In EM78P159N:

The register does not exist in real chip.

In ICE159N Simulator: C3 ~ C0

are IRC calibration bits in MCIRC mode.

Bit 3 ~ Bit 0 (C3 ~ C0):

are the Calibrators of internal RC mode

Cycle Time (ns)

Frequency (MHz)

390.6

2.56

365.0

2.74

342.5

2.92

322.6

3.1

304.9

3.28

289.0

3.46

274.7

3.64

261.8

3.82

250.0

4.00

239.2

4.18

229.4

4.36

220.3

4.54

211.9

4.72

204.1

4.9

196.7

5.08

190.1

5.26

NOTES:

1. Frequency values shown are theoretical and taken from an instance of a high

frequency mode. Hence they are shown for reference only. Definite values will

depend on the actual process.

2. Similar way of calculation is also applicable to Low Frequency mode.

Bits 4~7:

Not used

EM78P159NP Datasheet(PDF) 13 Page - ELAN Microelectronics Corp

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