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AN-003: W65C134S Replacement Notes for 8-bit Microcontrollers
R6511Q and W65C134S COMPARISON CHART
  R6511Q W65C134S
Package Type QUIP PLCC      QFP
Number of Pins 64 68            80
CPU Bit Manipulation Non Bit Manipulation
Timers 2 4
Watchdog Timer No Yes
UART 1 1
Interrupts 10 22
SRAM 192 x 8 192 x 8
ROM Without ROM 4096 x 8 Monitor ROM
External Address A0-12, A15 A0-15
External Data D0-7 D0-7
IO Ports Ports A, B, C, D Ports 4, 5, 6 Port 3 Output
SIB No Yes
Frequency 1-2Mhz DC-8Mhz
Process NMOS CMOS
Power 1200mW 22mW
VDD 5V+/-5% 5V+/-5%, 2.8V




R6511Q vs W65C134SPL
PIN Notes W65C134SPL Notes R6511Q
1 Edge Sensing but No Latching P57/NE57 Edge Sensing and Latching 24 PB7
2   P60/RXD/TIN   32 PA7
3   P61/TXD/TOUT   33 PA6
4   P62   39 PA0
5   P63   38 PA1
6 SIB P64/SCLK NA 37 PA2
7 SIB P65/SDAT NA 36 PA3
8 SIB P66/CHIN NA 35 PA4
9 SIB P67/CHOUT NA 34 PA5
10   RESB   6 RESB
11   WEB   40 RWB
12   RUN/SYNC   22 SYNC
13   FCLKOB NA  
14   FCLK NA  
15   BE/RDY NA  
16 1x Clock Rate CLK See Comments 42 XTALI
17   CLKOB NC  
18   PHI2   45 PHI2
19   P00/A0   20 A0
20   P01/A1   19 A1
21   P02/A2   18 A2
22   P03/A3   17 A3
23   P04/A4   16 A4
24   P05/A5   15 A5
25   P06/A6   14 A6
26   P07/A7   3 A7
27   VSS   44 VSS
28   P10/A8   12 A8
29   P11/A9   11 A9
30   P12/A10   10 A10
31   P13/A11   9 A11
32   P14/A12   8 A12
33   P15/A13   60 PC6/A13
34   P16/A14   61 PC7/A14
35   P17/A15   7 A15
36   VDD   21 VDD
37 Output only P30/CS0B   62 PD0
38 Output only P31/CS1B   63 PD1
39 Output only P32/CS2B   64 PD2
40 Output only P33/CS3B   1 PD3
41 Output only P34/CS4B   2 PD4
42 Output only P35/CS5B   3 PD5
43 Output only P36/CS6B   4 PD6
44 Output only P37/CS7B   5 PD7
45   P20/D0   53 DB0
46   P21/D1   52 DB1
47   P22/D2   51 DB2
48   P23/D3   50 DB3
49   P24/D4   49 DB4
50   P25/D5   48 DB5
51   P26/D6   47 DB6
52   P27/D7   46 DB7
53   VSS   44 VSS
54   P40/NMIB   23 NMIB
55 IRQ1B P41/IRQ1B NA  
56 IRQ2B P42/IRQ2B NA 54 PC0
57   P43   55 PC1
58   P44/PE44   56 PC2
59   P45/PE45   57 PC3
60   P46/NE46   58 PC4
61   P47/NE47   59 PC5
62 Edge Sensing but No Latching P50/PE50 Edge Sensing and Latching 31 PB0
63 Edge Sensing but No Latching P51/PE51 Edge Sensing and Latching 30 PB1
64 Edge Sensing but No Latching P52/NE52 Edge Sensing and Latching 29 PB2
65 Edge Sensing but No Latching P53/NE53 Edge Sensing and Latching 28 PB3
66 Edge Sensing but No Latching P54/PE54 Edge Sensing and Latching 27 PB4
67 Edge Sensing but No Latching P55/PE55 Edge Sensing and Latching 26 PB5
68 Edge Sensing but No Latching P56/PE56 Edge Sensing and Latching 25 PB6


Comments

1. NC=No Connect
2. NA=Not Available on R6511Q
3. Note: All W65c134SPL IO pins have bus holding devices.
4. The W65C134SPL does not have the ability of dividing the incoming clock. Therefore, PHI2 is the same frequency as the clock. The 11Q has the ability to divide the incoming clock input by 1, 2 or 4.
  

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