參數(shù)資料
型號(hào)： UPD77114GC-XXX-9EU
廠商： NEC Corp.
英文描述： MOS INTEGRATED CIRCUIT
中文描述： 馬鞍山集成電路
文件頁(yè)數(shù)： 22/62頁(yè)
文件大?。?/td> 352K
代理商： UPD77114GC-XXX-9EU
Data Sheet U14373EJ3V0DS
22
μ
PD77113A, 77114
5.1.1 Self boot
The boot-up ROM transfers the instruction code stored in the data memory space to the instruction RAM, based
on the boot parameter written to address 0x4000 of the Y data memory. Generally, with a mask ROM model, this
function is implemented by storing the instructions to be booted in the data ROM.
In addition, the instructions to be booted can be also stored in an external data area in the form of flash ROM, and
self boot can be executed from this external data area.
5.1.2 Host boot
In this boot mode, a boot parameter and instruction code are obtained via the host interface, and transferred to the
instruction RAM.
5.2 Reboot
By calling the next reboot entry from the program, the contents of the instruction RAM can be rewritten.
Reboot Mode
Entry Address
Word reboot
0x2
X memory
Byte reboot
0x4
Word reboot
0x1
Self boot
Y memory
Byte reboot
0x3
Host boot
Host reboot
0x5
5.2.1 Self reboot
The instruction codes stored in the data memory are transferred to the instruction RAM.
Set the following parameters and call the entry address of the corresponding reboot mode to execute self reboot.
R7L: Number of instruction steps for rebooting
DP3: First address of X memory in which instruction codes are stored (in the case of reboot from X memory),
or first address of the instruction memory to be loaded (in the case of reboot from Y memory)
DP7: First address of instruction memory to be loaded (in the case of reboot from X memory), or first address
of X memory in which instruction codes are stored (in the case of reboot from Y memory)
5.2.2 Host reboot
An instruction code is obtained via the host interface and transferred to the instruction RAM.
The entry address of is 0x5. Host reboot is executed by calling this address after setting the following parameter:
R7L: Number of instruction steps for rebooting
DP3: First address of instruction memory to be loaded
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