EZ-USB Datasheet, PDF (33/334 Pages) Cypress Semiconductor – The EZ-USB USB Integrated Circuit

1.17 EZ-USB Product Family
The EZ-USB family is available in various pinouts to serve different system requirements
and costs. Table 1-2 shows the feature set for each member of the EZ-USB Series 2100
Family.
Table 1-2. EZ-USB Series 2100 Family
Part RAM
Number Size ^ISO
Support
AN2121S 4KB Y
AN2122S 4KB N
AN2122T 4KB N
AN2125S 4KB Y
AN2126S 4KB N
AN2126T 4KB N
AN2131Q 8KB Y
AN2131S 8KB Y
AN2135S 8KB Y
AN2136S 8KB N
Key Features
Endpoints
Data Bus I/O Rate Prog
or Port B Bytes/s Max I/Os
Package
Max UART
(Async) Speed
(Kbaud)
32
Port B
600K
16 S = 44 PQFP
115.2
13
Port B
600K
16 S = 44 PQFP
230.4
13
Port B
600K
19 T = 48 TQFP
230.4
32 Data Bus 2M
8 S = 44 PQFP
115.2
13 Data Bus 2M
8 S = 44 PQFP
230.4
13 Data Bus 2M
11 T = 48 TQFP
230.4
32
Both
2M
24 Q = 80 PQFP 115.2
32
Port B
600K
16 S = 44 PQFP
115.2
32 Data Bus 2M
8 S = 44 PQFP
115.2
16 Data Bus 2M
8 S = 44 PQFP
115.2
Power
Saving
Option
N
N
Y
N
N
Y
N
N
N
N
IBN/
STOP
N
Y
Y
N
Y
Y
N
N
N
N
1.18 Summary of AN2122, AN2126 Features
This section summarizes the features of the AN2122 and AN2126 packages. These fea-
tures are not available in the other packages of the EZ-USB family.
Power Saving Option
To reduce power, the 8051 processor can be run at half speed. When the CPU12MHZ pin
is tied high, the 8051 processor core runs at 12 MHz. When tied low, the 8051 runs at the
normal 24 MHz. The logic state of this pin should never be changed while the 8051 is
running.
230 Kbaud UART Operation
Two control bits in a register, UART230, allow 230-Kbaud operation by UART0 and
UART1 (see Section 12.8, "230-Kbaud UART Operation - AN2122, AN2126").
Page 1-16
Chapter 1. Introducing EZ-USB
EZ-USB TRM v1.9