AN-003: W65C134S Replacement Notes for 8-bit Microcontrollers


	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.