SNAA410 July   2024 CDCDB2000 , LMKDB1108 , LMKDB1120 , LMKDB1204

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 RC19020 vs. LMKDB1120 Comparison
    1. 2.1 RC19020 vs. LMKDB1120 Pin Comparison
    2. 2.2 RC19020 vs. LMKDB1120 Exposed Registers Comparison
  6. 3 9QXL2001B vs. LMKDB1120 Comparison
    1. 3.1 9QXL2001B vs. LMKDB1120 Pin Comparison
    2. 3.2 9QXL2001B vs. LMKDB1120 Exposed Register Comparison
  7. 4 9QXL2001C vs. LMKDB1120 Comparison
    1. 4.1 9QXL2001C vs. LMKDB1120 Pin Comparison
    2. 4.2 9QXL2001C vs. LMKDB1120 Exposed Registers Comparison
  8. 5 CDCDB2000 vs. LMKDB1120 Comparison
  9. 6 RC19008 vs. LMKDB1108 Comparison
    1. 6.1 RC19008 vs. LMKDB1108 Pin Comparison
    2. 6.2 RC19008 vs. LMKDB1108 Exposed Registers Comparison
  10. 7 RC19004 vs. LMKDB1104 Comparison
    1. 7.1 RC19004 vs. LMKDB1104 Pin Comparison
    2. 7.2 RC19004 vs. LMKDB1104 Exposed Register Comparison
  11. 8 RC19204 vs. LMKDB1204 Comparison
    1. 8.1 RC19204 vs. LMKDB1204 Pin Comparison
    2. 8.2 RC19204 vs. LMKDB1204 Exposed Register Comparison
  12. 9 RC19202 vs. LMKDB1202 Comparison
    1. 9.1 RC19202 vs. LMKDB1202 Pin Comparison
    2. 9.2 RC19202 vs. LMKDB1202 Exposed Registers Comparison
  13. 10RC19002 vs. LMKDB1102 Comparison
    1. 10.1 RC19002 vs. LMKDB1102 Pin Comparison
    2. 10.2 RC19002 vs. LMKDB1102 Exposed Registers Comparison
  14. 11Summary
  15. 12References

6.1 RC19008 vs. LMKDB1108 Pin Comparison

To summarize, when replacing the RC19008 with the LMKDB1108:

  • When SBI is disabled, do not leave OE pins floating and depend on the internal pulldown resistors of the OE pins. Instead, drive OE pins low or high through external controllers, or pull OE pins low or high through external resistors.
  • Do not leave the vPWRGD/PWRDN# pin (12) floating and depend on the internal pulldown resistor on the LMKDB1108. Instead, drive pin 12 low or high through external controllers, or pull pin 12 low or high through external resistors.
PIN Pin Differences between RC19008 and LMKDB1108 that Affect Drop-In Replacements Design Requirements when Replacing the RC19008 with the LMKDB1108
TI NAME RENESAS NAME NO. TYPE
Input
CLKIN_P CLKIN 8 I No difference N/A.
CLKIN_N CLKINb 9 I
Output
CLK0_P CLK13 15 O No difference N/A.
CLK0_N CLKb13 16 O
CLK1_P CLK10 17 O
CLK1_N CLKb10 18 O
CLK2_P CLK7 22 O
CLK2_N CLKb7 23 O
CLK3_P CLK6 24 O
CLK3_N CLKb6 25 O
CLK4_P CLK5 28 O
CLK4_N CLKb5 29 O
CLK5_P CLK3 31 O
CLK5_N CLKb3 32 O
CLK6_P CLK2 35 O
CLK6_N CLKb2 36 O
CLK7_P CLK1 38 O
CLK7_N CLKb1 39 O
Output Enable
vOE0#/SHFT_LD# OEb13_SHFT_LDb 14 I OE mode SBI Mode OE mode SBI Mode
RC19008 has an internal pullup resistor while LMKDB1108 has an internal pulldown resistor. TI decided to follow DB2000QL’s definition which states that the OE pins require internal pulldown resistors. No difference. Do not leave these pins floating and depend on the internal resistors. Drive OE pins low or high through external controllers, or pull OE pins low or high through external resistors. N/A.
vOE1#/SBI_IN OEb10_SBI_IN 19 I
vOE2# OEb7 21 I RC19008 has an internal pullup resistor while LMKDB1108 has an internal pulldown resistor. TI decided to follow DB2000QL’s definition as a guideline which states that the OE pins require internal pulldown resistors. Do not leave these pins floating and depend on the internal resistor. Drive OE pins low or high through external controllers, or pull OE pins low or high through external resistors.
vOE3# OEb6 27 I
vOE4#/SBI_CLK OEb5_SBI_CLK 30 I OE mode SBI Mode OE mode SBI Mode
RC19008 has an internal pullup resistor while LMKDB1108 has an internal pulldown resistor. TI decided to follow DB2000QL’s definition as a guideline which states that the OE pins require internal pulldown resistors. No difference. Do not leave this pin floating and depend on the internal pulldown resistor of the LMKDB1108. Drive OE pin low or high through external controllers, or pull OE pin low or high through external resistors. N/A.
vOE5# OEb3 33 I RC19008 has an internal pullup resistor while LMKDB1108 has an internal pulldown resistor. TI decided to follow DB2000QL’s definition as a guideline which states that the OE pins require internal pulldown resistors. Do not leave this pin floating and depend on the internal resistor. Drive OE pin low or high through external controllers, or pull OE pin low or high through external resistors.
vOE6#/SBI_OUT OEb2_SBI_OUT 34 I OE mode SBI Mode OE mode SBI Mode
RC19008 has an internal pullup resistor while LMKDB1108 has an internal pulldown resistor. TI decided to follow DB2000QL’s definition which states that the OE pins require internal pulldown resistors. No difference. Do not leave this pin floating and depend on the internal resistor. Drive OE pin low or high through external controllers, or pull OE pin low or high through external resistors. N/A.
vOE7# OEb1 40 I RC19008 has an internal pullup resistor while LMKDB1108 has an internal pulldown resistor. TI decided to follow DB2000QL’s definition which states that the OE pins require internal pulldown resistors. Do not leave this pin floating and depend on the internal resistor. Drive OE pin low or high through external controllers, or pull OE pin low or high through external resistors.
Communication
SMB_DATA SDATA 5 I/O No difference N/A.
SMB_CLK SCLK 6 I
vSBI_EN SBI_ENQ 11 I
^vSADR1_tri SADR_tri1 3 I
^vSADR0_tri SADR_tri0 4 I
Power
VDDA VDDDIG 7 P Completing a drop-in replacement does not require any changes on this pin. Pin name and function are different between the RC19008 and the LMKDB1108. TI decided to have an input receiver power supply pin to follow DB2000QL’s definition as a guideline and name this pin according to this definition. DB2000QL’s definition establishes this pin's name as VDDA. Renesas does not seem to be following DB2000QL's definition and do not have an input receiver power supply pin for the RC19008. No changes are required. Keep the same power filtering used for the RC19008.
VDD VDDCLK 10 P No difference
VDD VDDCLK 13 P
VDD VDDCLK 20 P
VDD VDDCLK 26 P
VDD VDDCLK 37 P
Miscelleneous
DAP EPAD GND/41 G No difference N/A.
LOS# LOSb 1 O
^SLEWRATE_SEL SLEWRATE_SEL 2 I
vPWRGD/PWRDN# PWRGD_PWRDNb 12 I RC19008 has an internal pullup resistor while LMKDB1108 has an internal pulldown resistor. TI followed DB2000QL’s definition as a guideline which states that the PWRGD/PWRDN# pin requires an internal pulldown resistor. Do not leave this pin floating and depend on the internal resistor. Drive pin low or high through external controllers, or pull pin low or high through external resistors.