AN2187

6 Register map

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6

Register map

Registers are strictly identical between ST72F324 & ST72F324B and between ST72F321 &

ST72F321B.

In the ST72F325, some register addresses and bit locations are added for the CSS and the

extra peripherals available in ST72F325 devices.

Note: For easy software migration, two general rules have to be followed:

●

All “reserved” byte memory areas must never be “read” or “write”.

●

All “reserved” or “unused” bits must be left unchanged when accessing the byte.

6.1

Register Address

Please, refer to the datasheet for the description of the new features.

Figure 2.

Register Map Modifications

@Block

Register

Label

0018h

to

001Eh

Reserved Area (7 bytes)

0073h

to

007Dh

Reserved Area (7 bytes)

@Block

Register

Label

0018h

0019h

001Ah

001Bh

001Ch

001Dh

001Eh

I2CCRI

I2CSR1

I2CSR2

I2CCCR

I2COAR1

I2COAR2

I2CDR

0073h

0074h

0075h

0076h

0077h

0078h

0079h

007Ah

007Bh

007Ch

007Dh

PWM ART

PWMDCR3

PWMDCR2

PWMDCR1

PWMDCR0

PWMCR

ARTCSR

ARTCAR

ARTARR

ARTICCSR

ARTICR1

ARTICR2

ST72F324

ST72F325