EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 190

• Manufacturer Part Number: EZ80F920120MOD
• Description: MODULE EZ80F92 512K 20MHZ
• Manufacturer: Zilog

Specifications of EZ80F920120MOD

• Module/board Type: Development Module
• Processor Series: EZ80F92x
• Core: eZ80
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 1 MB
• Interface Type: Cable
• Maximum Clock Frequency: 20 MHz
• Operating Supply Voltage: 0 V to 3.3 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP
• Development Tools By Supplier: eZ80F920200ZCOG
• Minimum Operating Temperature: 0 C
• For Use With/related Products: eZ80F92
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3157; EZ80F920120MOD

PS015308-0404
ZDI Write Data Registers
These three registers are used in the ZDI Write Only register address space to store the
data that is written when a Write instruction is sent to the ZDI Read/Write Control register
(ZDI_RW_CTL). The ZDI Read/Write Control register is located at ZDI address
immediately following the ZDI Write Data registers. As a result, the ZDI Master is
allowed to write the data to {ZDI_WR_U, ZDI_WR_H, ZDI_WR_L} and the Write com-
mand in one data transfer operation. See ZDI Write Data Registers (ZDI_WR_U = 13h,
ZDI_WR_H = 14h, and ZDI_WR_L = 15h in the ZDI Register Write Only Address
Space).
Table 99. ZDI Write Data Registers (ZDI_WR_U = 13h, ZDI_WR_H = 14h,
and ZDI_WR_L = 15h in the ZDI Register Write Only Address Space)
ZDI Read/Write Control Register
The ZDI Read/Write Control register is used in the ZDI Write Only Register address to
read data from, write data to, and manipulate the CPU’s registers or memory locations.
When this register is written, the eZ80F92 device immediately performs the operation cor-
responding to the data value written as described in ZDI Read/Write Control Register
Functions (ZDI_RW_CTL = 16h in the ZDI Register Write Only Address Space). When a
Read operation is executed via this register, the requested data values are placed in the ZDI
Read Data registers {ZDI_RD_U, ZDI_RD_H, ZDI_RD_L}. When a Write operation is
executed via this register, the Write data is taken from the ZDI Write Data registers
{ZDI_WR_U, ZDI_WR_H, ZDI_WR_L}. See ZDI Read/Write Control Register Func-
tions (ZDI_RW_CTL = 16h in the ZDI Register Write Only Address Space). Refer to the
eZ80 CPU User Manual (UM0077) for information regarding the CPU registers.
Bit
Reset
CPU Access
Note: X = Undefined; W = Write.
Bit
Position
[7:0]
ZDI_WR_L,
ZDI_WR_H,
or
ZDI_WR_L
Value Description
00h–
FFh
W
P R E L I M I N A R Y
X
7
These registers contain the data that is written during
execution of a Write operation defined by the
ZDI_RW_CTL register. The 24-bit data value is stored as
{ZDI_WR_U, ZDI_WR_H, ZDI_WR_L}. If less than 24 bits
of data are required to complete the required operation,
the data is taken from the least-significant byte(s).
W
6
X
W
X
5
W
X
4
W
X
3
Product Specification
W
X
ZiLOG Debug Interface
2
eZ80F92/eZ80F93
W
X
1
16h
W
X
0
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