C511 datasheet(13/43 Pages) SIEMENS

13 / 43 page

C511 / C513

Semiconductor Group

Table 4

Pin Definitions and Functions in Programming Mode (C513A-H only)

Symbol

Pin Number

I/O*) Function

P-LCC-44

PRES

Programming Interface Reset

A high level on this input resets the programming interface and

its registers to their initial state.

AD0 - AD7 43 - 36

I/O

Bidirectional Address/Data Bus

AD0-7 is used to transfer data to and from the registers of the

programming interface and to read the data of the memory field

during EEPROM verification.

PALE

Programming Address Latch Enable

This input is used to latch address information at AD0-7. The

trailing edge of PALE is used to latch the register addresses.

Each read or write access in programming mode must be

initiated by a PALE high pulse.

PRD

Programming Read Control

A low level at this pin (and PCS=low) enables the AD0-7 buffers

for reading of the data or control registers of the programming

interface.

PWR

Programming Write Control

A low level at this pin (and PCS=low) causes the data at AD0-

7 to be written into the data or control registers of the

programming interface.

PCS

Programming Chip Select

A low level at this pin enables the access to the registers of the

programming interface. If PCS is active, either PRD or PWR

control whether data is read or written into the registers.

PCS should be always deactivated between subsequent

accesses to the programming interface.

XTAL2

–

XTAL2

Output of the inverting oscillator amplifier.

XTAL1

–

XTAL1

Input to the inverting oscillator amplifier and input to the internal

clock generator circuits.

To drive the device from an external clock source, XTAL1

should be driven, while XTAL2 is left unconnected. During the

device programming a clock must be always supplied.

*) I = Input

O = Output

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