ACE1001M8X datasheet(24/32 Pages) FAIRCHILD

No de pièce	ACE1001M8X

Description	Arithmetic Controller Engine (ACEx?? for Low Power Applications

Download	32 Pages

Scroll/Zoom	100%

Fabricant	FAIRCHILD [Fairchild Semiconductor]

Site Internet	http://www.fairchildsemi.com

Logo

24 / 32 page

24

www.fairchildsemi.com

ACE1001 Product Family Rev. B.1

10.0 In-circuit Programming Specification10,11

The ACEx microcontroller supports in-circuit programming of the inter-

nal data EEPROM, code EEPROM, and the initialization registers.

An externally controlled four wire interface consisting of a LOAD

control pin (G3), a serial data SHIFT-IN input pin (G4), a serial data

SHIFT-OUT output pin (G2), and a CLOCK pin (G1) is used to

access the on-chip memory locations. Communication between the

ACEx microcontroller and the external programmer is made through

a 32-bit command and response word described in Table 14.

The serial data timing for the four-wire interface is shown in Figure

22 and the programming protocol is shown in Figure 21.

10.1 Write Sequence

The external programmer brings the ACEx microcontroller into

programming mode by applying a super voltage level to the LOAD

pin. The external programmer then needs to set the LOAD pin to 5V

before shifting in the 32-bit serial command word using the SHIFT_IN

and CLOCK signals. By definition, bit 31 of the command word is

shifted in first. At the same time, the ACEx microcontroller shifts out

the 32-bit serial response to the last command on the SHIFT_OUT

pin. It is recommended that the external programmer samples this

signal t

ACCESS (1µs) after the rising edge of the CLOCK signal. The

serial response word, sent immediately after entering programming

mode, contains indeterminate data.

After 32 bits have been shifted into the device, the external

programmer must set the LOAD signal to 0V, and then apply two

clock pulses as shown in Figure 21 to complete program cycle.

The SHIFT_OUT pin acts as the handshaking signal between the

device and programming hardware once the LOAD signal is

brought low. The device sets SHIFT_OUT low by the time the

programmer has sent the second rising edge during the LOAD =

0V phase (if the timing specifications in Figure 21 are obeyed).

The device will set the R bit of the Status register when the write

operation has completed. The external programmer must wait for

the SHIFT_OUT pin to go high before bringing the LOAD signal to

5V to initiate a normal command cycle.

10.2 Read Sequence

When reading the device after a write, the external programmer must

set the LOAD signal to 5V before it sends the new command word.

Next, the 32-bit serial command word (for during a READ) should be

shifted into the device using the SHIFT_IN and the CLOCK signals

while the data from the previous command is serially shifted out on

the SHIFT_OUT pin. After the Read command has been shifted into

the device, the external programmer must, once again, set the LOAD

signal to 0V and apply two clock pulses as shown in Figure 21 to

complete READ cycle. Data from the selected memory location, will

be latched into the lower 8 bits of the command word shortly after the

second rising edge of the CLOCK signal.

Writing a series of bytes to the device is achieved by sending a

series of Write command words while observing the devices

handshaking requirements.

Reading a series of bytes from the device is achieved by sending

a series of Read command words with the desired addresses in

sequence and reading the following response words to verify the

correct address and data contents.

The addresses of the data EEPROM and code EEPROM loca-

tions are the same as those used in normal operation.

Powering down the device will cause the part to exit programming

mode.

Table 14: 32-Bit Command and Response Word

Bit number

Input command word

Output response word

bits 31 – 30

Must be set to 0

X

bit 29

Set to 1 to read/write data EEPROM, or the

X

initialization registers, otherwise 0

bit 28

Set to 1 to read/write code EEPROM,

X

otherwise 0

bits 27 – 25

Must be set to 0

X

bit 24

Set to 1 to read, 0 to write

X

bits 23 – 18

Must be set to 0

X

bits 17 – 8

Address of the byte to be read or written

Same as Input command word

bits 7 – 0

Data to be programm ed or zero if data is to be read

Programmed data or data read at specified address

10 Application Note reference: "How to In-Circuit Program the ACEx Family of Microcontrollers."

11 During in-circuit programming, G5 must be either not connected or driven high.

Numéro de pièce similaire - ACE1001M8X

Fabricant	No de pièce	Fiches technique	Description
List of Unclassifed Man...	ACE100	201Kb / 4P	Evaluation Kit For A/D Converters
RHOPOINT COMPONENTS	ACE100	209Kb / 4P	Evaluation Kit For ADC100 Series A/D Converters

More results

Description similaire - ACE1001M8X

Fabricant	No de pièce	Fiches technique	Description
Fairchild Semiconductor	ACE1101	152Kb / 33P	Arithmetic Controller Engine (ACEx?? for Low Power Applications
	ACE1202	2Mb / 39P	Arithmetic Controller Engine (ACEx?? for Low Power Applications
	ACE1501	1Mb / 33P	ACE1501 Product Family Arithmetic Controller Engine (ACEx?? for Low Power Applications
	ACE8000	203Kb / 31P	ACE8001 Product Family Arithmetic Controller Engine (ACEx?? for Low Power Applications
	ACE1502	1Mb / 33P	Arithmetic Controller Engine for Low Power Applications
	FAN302UL	1Mb / 19P	PWM Controller for Low Standby Power Battery-Charger Applications
Analog Devices	ADP1043	141Kb / 8P	Digital Controller for Isolated Power Supply Applications Rev. PrA
	ADP1043A	1Mb / 72P	Digital Controller for Isolated Power Supply Applications REV. 0
	ADP1046A	1Mb / 88P	Digital Controller for Isolated Power Supply Applications REV. 0
Fairchild Semiconductor	FAN302HLMY	1Mb / 18P	PWM Controller for Low Standby Power Battery- Charger Applications ??mWSaver??Technology

More results

ACE1001M8X Fiches technique(PDF) 24 Page - Fairchild Semiconductor

ACE1001M8X Fiches technique(HTML) 24 Page - Fairchild Semiconductor

Numéro de pièce similaire - ACE1001M8X

Description similaire - ACE1001M8X

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Fiches technique Télécharger

Lien URL