Q67120-C850 datasheet(11/58 Pages) SIEMENS

Part #	Q67120-C850

Description	16-Bit CMOS Single-Chip Microcontrollers with/without oscillator prescaler with 32 KByte Flash EPROM

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

Direct Link	http://www.siemens.com/

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11 / 58 page

SAB 88C166(W)

Semiconductor Group

10

FCR (FFA0H / D0H)

SFR

Reset Value: 00X0H

*)

*) The reset value of bit VPPREV depends on the voltage on pin V

PP.

Note: The FCR is no real register but is rather virtually mapped into the active address space of the

Flash memory while the Flash writing mode is active. In writing mode all direct (mem)

accesses refer to the FCR, while all indirect ([Rwn]) accesses refer to the Flash memory

array itself.

Bit

Function

FWE

Flash Write Enable Bit (see description below)

0 :

Flash write operations (program / erase) disabled

1 :

Flash write operations (program / erase) enabled

FEE

Flash Erase Enable Bit (Significant only, when FWE = ’1’, see description below)

0 :

Flash programming mode selected

1 :

Flash erase mode selected

FBUSY

RPROT

Flash Busy Bit (On read accesses)

0 :

No Flash write operation in progress

1 :

Flash write operation in progress

Flash Read Protection Activation Bit (On write accesses)

0 :

Deactivates Flash read protection

1 :

Activates Flash read protection, if this is enabled

FCVPP

Flash Control VPP Bit

0 :

No VPP failure occurred during a Flash write operation

1 :

VPP failure occurred during a Flash write operation

VPPREV

Flash VPP Revelation Bit

0 :

No valid VPP applied to pin VPP

1 :

VPP applied to pin VPP is valid

CKCTL

Internal Flash Timer Clock Control

Determines the width of an internal Flash write or erase pulse

WDWW

Word / Double Word Writing Bit (significant only in programming mode)

0 :

16-bit programming operation

1 :

32-bit programming operation

BE

Bank Erase Select (significant only in erasing mode)

Selects the Flash Bank to be erased

FWMSET

Flash Writing Mode Set Bit (see description below)

0 :

Exit Flash writing mode, return to standard mode

1 :

Stay in Flash writing mode

rw

FEE

FWM

SET

rw

-

rw

-

rw

-

rw

-

rw

-

FWE

5

4

3

2

1

0

11

10

9

8

7

6

15

14

13

12

rw

r

rw

r/w

rw

VPP

REV

FC

VPP

FBUSY

RPROT

rw

CKCTL

WDW

W

BE

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Q67120-C850 Datasheet(PDF) 11 Page - Siemens Semiconductor Group

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