ST10 STMICROELECTRONICS [STMicroelectronics], ST10 Datasheet - Page 60

• Manufacturer Part Number: ST10
• Description: 16-BIT MCU WITH 32K BYTE ROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST10C167
XX - ELECTRICAL CHARACTERISTICS (continued)
XX.4.12 - External bus arbitration
V
C
C
Table 21 : External bus arbitration
Note
Figure 23 : External bus arbitration, releasing the bus
Notes 1. The ST10C167 will complete the currently running bus cycle before granting bus access.
60/65
t
t
t
t
t
t
t
DD
61
62
63
64
65
66
67
L
L
Symbol
(for Port0, Port1, Port 4, ALE, RD, WR, BHE, CLKOUT) = 100pF
(for Port 6, CS) = 100pF
= 5V
(On P6.x)
1. Guaranteed by design characterization.
2. This is the first possibility for BREQ to become active.
3. The CS outputs will be resistive high (pullup) after
SR
CC
CC
CC
CC
CC
CC
CLKOUT
BREQ
HOLD
HLDA
Signals
Other
CSx
10%, V
HOLD input setup time to CLKOUT
CLKOUT to HLDA hig or BREQ low delay
CLKOUT to HLDA low or BREQ high delay
CSx release
CSx drive
Other signals release
Other signals drive
SS
= 0V, T
t
61
Parameter
A
= -40 to +125 C
1)
1)
t
64
.
t
66
t
63
Max. CPU Clock
Min.
20
–
–
-4
-4
–
–
1
1
= 25MHz
t
t
62
64
Max.
3)
20
20
20
24
20
24
–
2)
1/2TCL = 1 to 25MHz
Variable CPU Clock
Min.
20
-4
-4
–
–
–
–
Max.
20
20
20
24
20
24
–
Unit
ns
ns
ns
ns
ns
ns
ns