24FC64 EEPROM Running at 1Mhz ?

[jackberg1]

Hello,

My Project : PIC18F25K22 and 24FC64 1Mhz SCL EEPROM

I'm able to run code for eeprom at 400Khz SCL , 24LC16B , LC64 , LC256 , LC512 with the MSSPx pin SCL2:PORTB.1, SDA2:PORTB.2

or any other I/O Port since the I2Cwrite,read are software base as my understanding so far except MSSPx on the SCL1,SCL1 does not run.

I having a hard time to figure the register for the MSSP: SSP1STAT, SSP1ADD, SSP1CON1

does a 24FC64 at 5Vcc (at 1 Mhz SCL) should be running twice as fast than a 24LC64 at 400kHZ.

from the Microchips AN989 it's seem's to be easy to make it work , but after couples a days on it I decided to look for answer.

my question is does anybody has any experience running the FC eeprom series at 1 Mhz clock on the MSSP port with PBP3 Pro

or PBP3 Pro compiler does not control the MSSP directly.


I'll appreciate any feedback.

Thanks to everyone.

[richard]

i2c via the mssp module works very well at whatever clock speed you set it to, done properly.
what have you tried ?
post the code for your best attempt

[jackberg1]

Hello Richard,

this is the code for all the eeprom I tested.

For the 24FC64
The best I've got it working it's at 400Khz on MSSP2 Port's
the MSSP1 does not work at all with the config I tried

'SSP1STAT = $40 'p:252
'SSP1ADD = $f 'p:258
'SSP1CON1 = $8 'p:254

I'm not well experienced but I'm trying and learning.
does the this PIC can work with an 24FC64 AT 1Mhz?

thanks for your help.

'-------------------------------------------------------------------------
' Name    : 18F25K22  EEPROM 1Mhz Test BK.pbp                                      
' only for 400Khz
' Date    : Jan 11 2025                                                
'
' not working PORTC.4, PORTC.3
' SDA / SCL  4K7 Resistor
'
'-------------------------------------------------------------------------
 Include "modedefs.bas" ' Include serial modes
;----[18F25K22 Hardware Configuration]------------------------------------------
#CONFIG
  CONFIG  FOSC = INTIO67     ; Internal oscillator block
  CONFIG  PLLCFG = On        ; Oscillator multiplied by 4
  CONFIG  PRICLKEN = ON      ; Primary clock enabled
  CONFIG  FCMEN = OFF        ; Fail-Safe Clock Monitor disabled
  CONFIG  BOREN = SBORDIS    ; Brown-out Reset enabled in hardware only (SBOREN is disabled)
  CONFIG  WDTEN = Off        ; WDT is always enabled. SWDTEN bit has no effect
  CONFIG  MCLRE = INTMCLR    ; RE3 input pin enabled; MCLR disabled
  CONFIG  LVP = Off          ; Single-Supply ICSP disabled
#ENDCONFIG


'SSP1STAT = $40     'p:252
'SSP1ADD = $f       'p:258
'SSP1CON1 = $8      'p:254


    ANSELA = 0      'All Digital
    ANSELB = 0
    ANSELC = 0


DEFINE OSC 64          '4MHz ~ 64MHz
TRISA = %00001000      ' 0:Out 1:In
TRISB = %00000000
TRISC = %00011000  
OSCCON = $70
OSCTUNE = $5F            


' EEPROM Setup -----------------------
'I VAR byte 'byte FOR 24LC16B
I VAR WORD 'Word FOR 24LC64 / 24LC256 / 24LC512
' EEPROM Setup -----------------------


H VAR BYTE        '24LC16B Only
CCT VAR BYTE      '24LC16B Only


' EEPROM Setup -----------------------
' 24LC16B
'aArray VAR BYTE[16]
'bArray VAR BYTE[16]


' 24LC64 / 24FC64
aArray VAR BYTE[32]
bArray VAR BYTE[32]


' 24LC256
'aArray VAR BYTE[64]
'bArray VAR BYTE[64]


' 24LC512
'aArray VAR BYTE[128]
'bArray VAR BYTE[128]


' Array Fill Char.
'For I = 0 To 127       ' 24LC512    65536 - 128 = 65408 Bytes
'For I = 0 To 63        ' 24LC256    32767 - 64 = 32703 Bytes
For I = 0 To 31         ' 24LC64     8192 - 32 = 8160 Bytes 
'For I = 0 To 15        ' 24LC16B    0-255


    aArray [I] = $FF    'Blank 
Next I
' EEPROM Setup -----------------------


Low PORTA.1                            ' Led end job
MAIN:                                  ' Main Routine


While PORTE.3 = 1: Wend                ' Button Press
PAUSE 100                              ' Bounce delay
While PORTE.3 = 0: Wend                ' Button release
PAUSE 100                              ' Bounce delay
Low PORTA.1


' EEPROM Setup -----------------------
'FOR H = 0 TO 7    '24LC16B
'    IF H = 0 THEN cct = $a0
'    IF H = 1 THEN cct = $a2
'    IF H = 2 THEN cct = $a4
'    IF H = 3 THEN cct = $a6
'    IF H = 4 THEN cct = $a8
'    IF H = 5 THEN cct = $aa
'    IF H = 6 THEN cct = $ac
'    IF H = 7 THEN cct = $ae




'For I = 0  To 65408 STEP 128  '24LC512 
'For I = 0  To 32704 STEP 64   '24LC256 
For I = 0  To 8160 Step 32    '24LC64  
'For I = 0  To 255 Step 16     '24LC16B 


'24LC16B OK
'I2Cwrite PORTC.2, PORTC.1,cct,I, [str aarray\16]  
'I2Cwrite PORTB.2, PORTB.1,cct,I, [str aarray\16]  


'24LC64 OK
'I2Cwrite PORTC.2, PORTC.1,%10100000,I, [str aarray\32] 
'I2Cwrite PORTB.2, PORTB.1,$A0,I, [str aarray\32]   




'-----------  24FC64  -------------------------------------


'24FC64   SAME 24LC64 
         ' MSSP1
         ' SDA1     SCL1
'I2Cwrite PORTC.4, PORTC.3,%10100000,I, [str aarray\32]  'PORT not working
         ' MSSP2
         ' SDA2     SCL2
I2Cwrite PORTB.2, PORTB.1,$A0,I, [str aarray\32]   


'-----------  24FC64  -------------------------------------




'24LC256 OK
'I2Cwrite PORTC.2, PORTC.1,$a0,I, [str aarray\64] 
'I2Cwrite PORTB.2, PORTB.1,%10100000,I, [str aarray\64] 


'24LC512  OK
'I2Cwrite PORTC.2, PORTC.1,$a0,I, [str aarray\128] 
'I2Cwrite PORTB.2, PORTB.1,%10100000,I, [str aarray\128]  


' EEPROM Setup -----------------------
PAUSE 10
Next I
' EEPROM Setup -----------------------
'NEXT H
' EEPROM Setup -----------------------
'SerOut PORTA.0,84, [" Done    : ",Dec I,13,10]
High PORTA.1
GoTo MAIN

[richard]

does the this PIC can work with an 24FC64 AT 1Mhz(sic)

yes, using mssp hardware i2c no problem


pbp has no "native" support for hardware ic2 you need to brew you own commands


https://support.melabs.com/forum/pic...c-hardware-i2c

[jackberg1]

Thanks richard.

[rsocor01]

I have used the I2C commands at 100KHz and 400KHz. I have never used it at 1MHz. I'm not sure if you can use the I2C commands at 1MHz. Below, there is a quote from the PBP help.

The timing of the I2C instructions is set so than standard speed devices (100KHz) will be accessible at clock speeds up to 8MHz. Fast mode devices (400KHz) may be used up to 20MHz.