z893232yfsc ZiLOG Semiconductor, z893232yfsc Datasheet - Page 15

• Manufacturer Part Number: z893232yfsc
• Description: 16-bit Digital Signal Processors
• Manufacturer: ZiLOG Semiconductor

EXT Register Assignments
The EXT registers support is extended in the Z893X3
family: In addition to up to seven external registers, there
are 28 internal registers on the EXT bus. There are 16
different pages of EXT registers. The same EXT7 register
exist in all the pages and control of the bank switching is
done via EXT7 register.
DS95DSP0101 Q4/95
EXT\Bank
EXT\Bank
EXT0
EXT1
EXT2
EXT3
EXT4
EXT5
EXT6
EXT7
EXT0
EXT1
EXT2
EXT3
EXT4
EXT5
EXT6
EXT7
5
A/D_ch1
A/D_ch2
A/D_ch3
SPI data
Port0
Port1/Port2
A/D_ch0
Bank/Int_status
0
Ext0-user
Ext1-user
Ext2-user
SPI data
Port0
Port1/Port2
A/D_ch0
Bank/Int_status
Table 7. EXT Register Assignments Banks 6–15
Table 6. EXT Register Assignments Banks 0–4
6-12
A/D_ch0
Bank/Int_status
1
Ext0-user
Ext1-user
Ext2-user
Ext3-user
Port0
A/D_ch1
Bank/Int_status
Port1/Port2
P R E L I M I N A R Y
13
A/D control
Timer0 control
Timer0 load
Timer0
Timer0 pr. load
Timer0 prescaler
A/D_ch0
Bank/Int_status
2
Ext4-user
A/D_ch2
Ext0-user
Ext1-user
Ext2-user
Ext3-user
Bank/Int_status
Port3
Banks 0 to 5 support different combinations of external
registers and internal data registers. The user should use
the bank that has the internal data registers and the
number of external registers to support his application and
to use this bank as a working bank to minimize the number
of bank switching. Bank 5 has all the A/D registers. Banks
13 to 15 are control registers bank. These control registers
are usually used only in the initialization routines.
14
Timer2 load
Timer1 load
Timer1
A/D_ch0
Timer1 control
Timer1 pr. load
Timer1 prescaler
Bank/Int_status
3
Ext0-user
Ext1-user
Ext2-user
SPI data
Ext4-user
A/D_ch3
Bank/Int_status
Ext5-user
16-B
IT
D
IGITAL
15
P2 control
4
Ext0-user
Ext1-user
Ext2-user
Ext3-user
Ext4-user
Ext5-user
Ext6-user
Bank/Int_status
P0 control
P1 control
Wait State
SPI control
PLL control
Int. Allocation
Bank/Int_status
S
IGNAL
Z89323/373/393
P
ROCESSORS
15