参数资料
型号: PSD4235F1V-12B81I
厂商: 意法半导体
英文描述: Flash In-System-Programmable Peripherals for 16-Bit MCUs
中文描述: Flash在系统可编程外设的16位微控制器
文件页数: 33/93页
文件大小: 503K
代理商: PSD4235F1V-12B81I
MCU
CNTL0
CNTL1
CNTL2
PD3
PD0**
ADIO0
PF3-PF0
68302, 68306
R/W
LDS
UDS
*
AS
*
MMC2001
68330, 68331
R/W
DS
SIZ0
*
AS
A0
*
68332, 68340
68LC302,
WEL
OE
WEH
AS
*
MMC2001
68HC16
R/W
DS
SIZ0
*
AS
A0
*
68HC912
R/W
E
LSTRB
DBE
E
A0
*
68HC812***
R/W
E
LSTRB
**
A0
*
80196
WR
RD
BHE
*
ALE
A0
*
80196SP
WRL
RD
*
WRH
ALE
A0
*
80186
WR
RD
BHE
*
ALE
A0
*
80C161
80C164-80C167
WR
RD
BHE
*
ALE
A0
*
80C51XA
WRL
RD
PSEN
WRH
ALE
A4/D0
A3-A1
H8/3044
WRL
RD
*
WRH
AS
A0
M37702M2
R/W
E
BHE
*
ALE
A0
*
PSD4000 Series
Preliminary Information
36
The
PSD4000
Functional
Blocks
(cont.)
9.3 Microcontroller Bus Interface
The “no-glue logic” PSD4000 Microcontroller Bus Interface can be directly connected to
most popular microcontrollers and their control signals. Key 16-bit microcontrollers with
their bus types and control signals are shown in Table 14. The MCU interface type is
specified using the PSDsoft.
Table 14. Microcontrollers and their Control Signals
***Unused CNTL2 pin can be configured as GPLD input. Other unused pins (PD3-0, PF3-0) can be
***configured for other I/O functions.
***ALE/AS input is optional for microcontrollers with a non-multiplexed bus.
***This configuration is for 68C812A4_EC at 5MHz, 3V only.
9.3.1. PSD4000 Interface to a Multiplexed Bus
Figure 16 shows an example of a system using a microcontroller with a 16-bit multiplexed
bus and a PSD4000. The ADIO port on the PSD4000 is connected directly to the
microcontroller address/data bus. ALE latches the address lines internally. Latched
addresses can be brought out to Port E, F or G. The PSD4000 drives the ADIO data bus
only when one of its internal resources is accessed and the RD input is active. Should the
system address bus exceed sixteen bits, Ports A, B, C, or F may be used as additional
address inputs.
9.3.2. PSD4000 Interface to a Non-Multiplexed Bus
Figure 17 shows an example of a system using a microcontroller with a 16-bit
non-multiplexed bus and a PSD4000. The address bus is connected to the ADIO Port, and
the data bus is connected to Port F and G. Port F and G are in tri-state mode when the
PSD4000 is not accessed by the microcontroller. Should the system address bus exceed
sixteen bits, Ports A, B or C may be used for additional address inputs.
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