SERIES IP1K110 INDUSTRIAL I/O PACK RECONFIGURABLE DIGITAL I/O MODULE
__________________________________________________________________________________________
- 11 -
Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com
http://www.acromag.com
The address specified in the Memory Address register will be
automatically incremented after the read or write cycle is
completed. Thus, when consecutive locations within the memory
are accessed the Memory Address register need not be manually
updated by software.
Read or write accesses to this register require four wait
states. A software or hardware reset has no affect on this
register.
Memory Address Register (Write Only, 16H)
The Memory Address register is used to point to one of 64K
words in memory. The 16 bits of this register are used to specify
one of 64K words that can be accessed via a read or write to the
Memory Data register. Writing to this register is possible via 16-
bit data transfers only.
The address specified in the Memory Address register will be
automatically incremented after the read or write cycle to the
Memory Data register is completed. Thus, when consecutive
locations within the memory are accessed the Memory Address
register need not be manually incremented by software.
A write access to this register requires one wait state. A
software or hardware reset will clear this register to zero.
Clock Control Reg 1 (Read/Write) – (Base + 18H)
The Clock Control Register 1 is a 16-bit read/write register.
This is used as part of the control for the Cypress CY22150
Programmable Clock. The register contains the following control
bits as specified in the Cypress CY22150 spec sheet.
Bit
Data
Bit
Data
D0
DIV1N(0)
D8
Q(0)
D1
DIV1N(1)
D9
Q(1)
D2
DIV1N(2)
D10
Q(2)
D3
DIV1N(3)
D11
Q(3)
D4
DIV1N(4)
D12
Q(4)
D5
DIV1N(5)
D13
Q(5)
D6
DIV1N(6)
D14
Q(6)
D7
DIV1SRC
D15
PO
A software or hardware reset will clear this register to zero.
Clock Control Reg 2 (Read/Write) – (Base + 1AH)
The Clock Control Register 2 is a 16-bit read/write register.
This is used as part of the control for the Cypress CY22150
Programmable Clock. The register contains the following control
bits as specified in the Cypress CY22150 spec sheet.
Bit
Data
Bit
Data
D0
PB(0)
D8
PB(8)
D1
PB(1)
D9
PB(9)
D2
PB(2)
D10
Pump(0)
D3
PB(3)
D11
Pump(1)
D4
PB(4)
D12
Pump(2)
D5
PB(5)
D13
CLKSRC0
D6
PB(6)
D14
CLKSRC1
D7
PB(7)
D15
CLKSRC2
A software or hardware reset will clear this register to zero.
Clock Control Reg 3 (Read/Write) – (Base + 1DH)
The Clock Control Register 3 is an 8-bit read/write register.
This is used as part of the control for the Cypress CY22150
Programmable Clock. In this register only D0 (bit 0) and D7 (bit
7) are required. The other bits (D1-D6) are not used.
The value for D0 is zero if the carrier board provides an 8MHz
clock to the FPGA. D0 is logic high if the carrier board provides a
32MHz signal to the FPGA. D7 is an enable/disable signal for the
CY22150 IC. Writing a ‘1’ to bit 7 will disable the clock generator
chip, including the programming function. Setting D7 to zero will
allow for normal operation. A software or hardware reset will
clear this register to zero.
Clock Trigger Register (Read/Write) – (Base + 1FH)
The Clock Trigger Register is an 8-bit register. To initiate
programming of the Cypress CY22150 Programmable Clock,
write a “1” to bit 0 of this register. During programming bit 0 will
remain logic high. The programming process takes
approximately 1.2ms to complete after the initial trigger. A
software or hardware reset has no affect on this register.
Program Procedure to Set Clock Frequency
At power up the programmable clock has no valid output.
The clock can be programmed for an output frequency from
250 KHz to 100 MHz. The clock can be programmed at any time
during device operation. Program the clock using the following
process.
The program words required for Clock Control Register 1, 2,
and 3 can be calculated using a program provided by Acromag
(BitCalc2K1 Version 2) supplied with the EDK. Alternately, using
the Clock Control Registers Data Maps and the CY22150
specification sheet the necessary values can be calculated.
Cypress has a program CyberClocks available to aid with
calculations. Note that the user will have to combine the
individual variables into the control words as outlined in the
register descriptions. The CY22150 Specification Sheets and
CyberClocks program are available from Cypress
at
www.cypress.com
.
The reference frequency input to the Cypress CY22150 is the
same as the carrier clock either 8MHz or 32MHz.
Procedure
1.
Start the BitCalc2K1 Version 2 program, enter the desired
frequency, and select the IP clock speed.
2.
Hit the Calculate Button.
3.
Write to the Clock Control Register 1 at base address plus
an offset of 18H using the data provided by the program.
4.
Write to the Clock Control Register 2 at base address plus
an offset of 1AH using the data provided by the program.
